plm/base: fix misc memory leaks

as reported by Coverity with CIDs 1196733 and 1196745

orte/mca/plm/base/plm_base_launch_support.c

@@ -14,7 +14,7 @@
  *                         et Automatique. All rights reserved.
  * Copyright (c) 2011-2012 Los Alamos National Security, LLC.
  * Copyright (c) 2013-2014 Intel, Inc. All rights reserved.
- * Copyright (c) 2014      Research Organization for Information Science
+ * Copyright (c) 2014-2015 Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
  * $COPYRIGHT$
  *
@@ -996,6 +996,10 @@ void orte_plm_base_daemon_callback(int status, orte_process_name_t* sender,
                 }
             }
         }
+        if (NULL != nodename) {
+            free(nodename);
+            nodename = NULL;
+        }
         idx = 1;
     }
     if (ORTE_ERR_UNPACK_READ_PAST_END_OF_BUFFER != rc) {

orte/mca/plm/base/plm_base_proxy.c

@@ -13,6 +13,8 @@
  * Copyright (c) 2011-2012 Los Alamos National Security, LLC.
  *                         All rights reserved. 
  * Copyright (c) 2013-2014 Intel, Inc.  All rights reserved.
+ * Copyright (c) 2015      Research Organization for Information Science
+ *                         and Technology (RIST). All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -311,6 +313,7 @@ int orte_plm_base_fork_hnp(void)
     jobid = ORTE_DAEMON_JOBID(ORTE_PROC_MY_NAME->jobid);
     if (ORTE_SUCCESS != (rc = orte_util_convert_jobid_to_string(&param, jobid))) {
         ORTE_ERROR_LOG(rc);
+        free(cmd);
         return rc;
     }
     opal_argv_append(&argc, &argv, param);
@@ -364,6 +367,7 @@ int orte_plm_base_fork_hnp(void)
         exit(1);
         
     } else {
+        free(cmd);
         /* I am the parent - wait to hear something back and
          * report results
          */
@@ -430,11 +434,12 @@ int orte_plm_base_fork_hnp(void)
         if (ORTE_SUCCESS != (rc = orte_rml_base_parse_uris(orte_process_info.my_daemon_uri,
                                                            ORTE_PROC_MY_DAEMON, NULL))) {
             ORTE_ERROR_LOG(rc);
+            free(orted_uri);
             return rc;
         }
 
         /* likewise, since this is also the HNP, set that uri too */
-        orte_process_info.my_hnp_uri = strdup(orted_uri);
+        orte_process_info.my_hnp_uri = orted_uri;
         orte_rml.set_contact_info(orte_process_info.my_hnp_uri);
         if (ORTE_SUCCESS != (rc = orte_rml_base_parse_uris(orte_process_info.my_hnp_uri,
                                                            ORTE_PROC_MY_HNP, NULL))) {
@@ -457,7 +462,6 @@ int orte_plm_base_fork_hnp(void)
             return rc;
         }
         /* all done - report success */
-        free(orted_uri);
         return ORTE_SUCCESS;
     }
 }