Don't destroy the event channel until after everything else has been

torn down.  Fixes trac:1582.

This commit was SVN r19800.

The following Trac tickets were found above:
  Ticket 1582 --> https://svn.open-mpi.org/trac/ompi/ticket/1582

ompi/mca/btl/openib/connect/btl_openib_connect_rdmacm.c

@@ -922,10 +922,6 @@ static void *rdmacm_unmonitor(int fd, int flags, void *context)
 {
     volatile int *barrier = (volatile int *) context;
 
-    if (NULL != event_channel) {
-        rdma_destroy_event_channel(event_channel);
-        event_channel = NULL;
-    }
     OPAL_OUTPUT((-1, "SERVICE rdmacm unlocking main thread"));
     *barrier = 1;
 
@@ -1885,6 +1881,12 @@ static int rdmacm_component_finalize(void)
     }
     OBJ_DESTRUCT(&server_listener_list);
 
+    /* Now we're all done -- destroy the event channel */
+    if (NULL != event_channel) {
+        rdma_destroy_event_channel(event_channel);
+        event_channel = NULL;
+    }
+
     mca_btl_openib_free_rdma_addr_list();
 
     return OMPI_SUCCESS;