orte-rmaps-base: update out-of-slots show_help message

Update the show_help message for when there are not enough slots to
run an application.

Also, remove a bunch of copies of this message in various show_help
text files that aren't used/referred to anywhere in the code.

Signed-off-by: Jeff Squyres <jsquyres@cisco.com>

orte/mca/rmaps/base/help-orte-rmaps-base.txt

@@ -10,7 +10,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
-# Copyright (c) 2011-2015 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2011-2018 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2011      Los Alamos National Security, LLC.
 #                         All rights reserved.
 # Copyright (c) 2014-2018 Intel, Inc. All rights reserved.
@@ -23,12 +23,35 @@
 # This is the US/English general help file for Open RTE's orterun.
 #
 [orte-rmaps-base:alloc-error]
-There are not enough slots available in the system to satisfy the %d slots
-that were requested by the application:
+There are not enough slots available in the system to satisfy the %d
+slots that were requested by the application:
+
   %s
 
-Either request fewer slots for your application, or make more slots available
-for use.
+Either request fewer slots for your application, or make more slots
+available for use.
+
+A "slot" is the Open MPI term for an allocatable unit where we can
+launch a process.  The number of slots available are defined by the
+environment in which Open MPI processes are run:
+
+  1. Hostfile, via "slots=N" clauses (N defaults to number of
+     processor cores if not provided)
+  2. The --host:N command line parameter (N defaults to 1 if not
+     provided)
+  3. Resource manager (e.g., SLURM, PBS/Torque, LSF, etc.)
+  4. If neither a hostfile, the --hosts command line parameter, nor an
+     RM is present, Open MPI defaults to the number of processor
+     cores
+
+In all the above cases, if you want Open MPI to default to the number
+of hardware threads instead of the number of processor cores, use the
+--use-hwthread-cpus option.
+
+Alternatively, you can use the --oversubscribe option to ignore the
+number of available slots when deciding the number of processes to
+launch.
+#
 [orte-rmaps-base:not-all-mapped-alloc]
 Some of the requested hosts are not included in the current allocation for the
 application:

orte/mca/rmaps/rank_file/help-rmaps_rank_file.txt

@@ -1,6 +1,6 @@
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
-# Copyright (c) 2011      Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2011-2018 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2013      Los Alamos National Security, LLC.
 #                         All rights reserved.
 # $COPYRIGHT$
@@ -90,14 +90,6 @@ some systems may require using full hostnames, such as
 [bad-index]
 Rankfile claimed host %s by index that is bigger than number of allocated hosts.
 #
-[orte-rmaps-rf:alloc-error]
-There are not enough slots available in the system to satisfy the %d slots
-that were requested by the application:
-    %s
-
-Either request fewer slots for your application, or make more slots available
-for use.
-#
 [bad-rankfile]
 Error, invalid rank (%d) in the rankfile (%s)
 #

orte/mca/rmaps/round_robin/help-orte-rmaps-rr.txt

@@ -11,6 +11,7 @@
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
 # Copyright (c) 2017      Intel, Inc. All rights reserved.
+# Copyright (c) 2018      Cisco Systems, Inc.  All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -19,15 +20,6 @@
 #
 # This is the US/English general help file for Open RTE's orterun.
 #
-[orte-rmaps-rr:alloc-error]
-There are not enough slots available in the system to satisfy the %d slots
-that were requested:
-
-  application: %s
-  host:  %s
-
-Either request fewer slots for your application, or make more slots available
-for use.
 [orte-rmaps-rr:multi-apps-and-zero-np]
 RMAPS found multiple applications to be launched, with
 at least one that failed to specify the number of processes to execute.

orte/mca/rmaps/seq/help-orte-rmaps-seq.txt

@@ -10,6 +10,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
+# Copyright (c) 2018      Cisco Systems, Inc.  All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -18,19 +19,8 @@
 #
 # This is the US/English general help file for Open RTE's orterun.
 #
-[orte-rmaps-seq:alloc-error]
-There are not enough slots available in the system to satisfy the %d slots
-that were requested by the application:
-
-  %s
-
-Either request fewer slots for your application or make more slots
-available for use.  If oversubscription is intended, add
---oversubscribe to the command line.
-#
 [orte-rmaps-seq:resource-not-found]
 The specified hostfile contained a node (%s) that is not in your
 allocation. We therefore cannot map a process rank to it. Please
 check your allocation and hostfile to ensure the hostfile only
 contains allocated nodes.
-

orte/mca/rtc/base/help-orte-rtc-base.txt

@@ -10,7 +10,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
-# Copyright (c) 2011-2014 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2011-2018 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2011      Los Alamos National Security, LLC.
 #                         All rights reserved.
 # Copyright (c) 2014      Intel, Inc.  All rights reserved.
@@ -22,13 +22,6 @@
 #
 # This is the US/English general help file for Open RTE's orterun.
 #
-[orte-rtc-base:alloc-error]
-There are not enough slots available in the system to satisfy the %d slots
-that were requested by the application:
-  %s
-
-Either request fewer slots for your application, or make more slots available
-for use.
 [orte-rtc-base:not-all-mapped-alloc]
 Some of the requested hosts are not included in the current allocation for the
 application: