Clean up sshmem/mmap error messages. This should be added to

cmr=v1.7.5:ticket=4432

This commit was SVN r31180.

The following Trac tickets were found above:
  Ticket 4432 --> https://svn.open-mpi.org/trac/ompi/ticket/4432

oshmem/mca/sshmem/mmap/help-oshmem-sshmem-mmap.txt

@@ -8,13 +8,21 @@
 # 
 # $HEADER$
 #
-# This is the US/English help file for Open SHMEM MCA error messages.
 #
 
-[mmap:out-of-memory]
-'sshmem' 'mmap' was failed to allocate shared memory segment
-of requested size. Returned error corresponds to
-out of memory case.
+[mmap segment failed]
+The OpenSHMEM "mmap" plugin in the "sshmem" framework failed to
+allocate a shared memory segement via the mmap system call.  This
+usually means that there are not enough resources available to your
+memory subsystem on your server. 
 
-Try decreasing symmetric heap area size with
-'-x SHMEM_SYMMETRIC_HEAP_SIZE=<value>'.
+Your OpenSHMEM job will now abort.
+
+   Server:         %s
+   Requested mmap
+     segment size: %u
+   Specific error: %s (%d)
+
+You can try to decrease the symmetric heap area with:
+
+"-x SHMEM_SYMMETRIC_HEAP_SIZE=<value>".

oshmem/mca/sshmem/mmap/sshmem_mmap_module.c

@@ -42,6 +42,7 @@
 #include "opal/util/show_help.h"
 #include "orte/util/show_help.h"
 
+#include "oshmem/proc/proc.h"
 #include "oshmem/mca/sshmem/sshmem.h"
 #include "oshmem/mca/sshmem/base/base.h"
 
@@ -198,11 +199,11 @@ segment_create(map_segment_t *ds_buf,
            "Failed to mmap() %llu bytes (errno=%d)",
                       (unsigned long long)size, errno)
             );
-        if (ENOMEM == errno) {
-            orte_show_help("help-oshmem-sshmem-mmap.txt",
-                           "mmap:out-of-memory",
-                           true);
-        }
+        opal_show_help("help-oshmem-sshmem-mmap.txt",
+                "mmap segment failed",
+                true,
+                orte_process_info.nodename, (unsigned) size,
+                strerror(errno),errno);
         return OSHMEM_ERR_OUT_OF_RESOURCE;
     }