fix misc memory leaks

as already reported by Coverity with CIDs
71818, 71819, 72250, 715767, 1196749 and 1274002

ompi/mca/bcol/ptpcoll/bcol_ptpcoll_module.c

@@ -667,6 +667,7 @@ mca_bcol_base_module_t **mca_bcol_ptpcoll_comm_query(mca_sbgp_base_module_t *sbg
 
     ptpcoll_module = OBJ_NEW(mca_bcol_ptpcoll_module_t);
     if (NULL == ptpcoll_module) {
+        free(ptpcoll_modules);
         return NULL;
     }
 

opal/mca/btl/base/btl_base_select.c

@@ -140,6 +140,12 @@ int mca_btl_base_select(bool enable_progress_threads,
                     }
                     sm = OBJ_NEW(mca_btl_base_selected_module_t);
                     if (NULL == sm) {
+                        if (NULL != include) {
+                            opal_argv_free(include);
+                        }
+                        if (NULL != exclude) {
+                            opal_argv_free(exclude);
+                        }
                         return OPAL_ERR_OUT_OF_RESOURCE;
                     }
                     sm->btl_component = component;

orte/mca/oob/tcp/oob_tcp_listener.c

@@ -303,6 +303,7 @@ static int create_listen(void)
                 opal_output(0,"mca_oob_tcp_component_init: socket() failed: %s (%d)", 
                             strerror(opal_socket_errno), opal_socket_errno);
             }
+            opal_argv_free(ports);
             return ORTE_ERR_IN_ERRNO;
         }
 

orte/mca/rmaps/lama/rmaps_lama_module.c

@@ -867,13 +867,8 @@ static int orte_rmaps_lama_map_core(orte_job_t *jdata)
         OBJ_RELEASE(max_tree);
     }
 
-    if( NULL != pu_idx_ref ) {
-        free(pu_idx_ref);
-    }
-
-    if( NULL != last_pu_idx_ref ) {
-        free(last_pu_idx_ref);
-    }
+    free(pu_idx_ref);
+    free(last_pu_idx_ref);
 
     if( NULL != last_level_str ) {
         free(last_level_str);

orte/mca/rmaps/rank_file/rmaps_rank_file.c

@@ -294,6 +294,7 @@ static int orte_rmaps_rf_map(orte_job_t *jdata)
                 /* parse the slot_list to find the socket and core */
                 if (ORTE_SUCCESS != (rc = opal_hwloc_base_slot_list_parse(slots, node->topology, rtype, bitmap))) {
                     ORTE_ERROR_LOG(rc);
+                    hwloc_bitmap_free(bitmap);
                     goto error;
                 }
                 /* note that we cannot set the proc locale to any specific object