Merge pull request #1044 from hjelmn/opal_keval_fix

opal/keyval: reset buffer pointer/size in finalize

opal/util/keyval_parse.c

@@ -55,6 +55,8 @@ int
 opal_util_keyval_parse_finalize(void)
 {
     if (NULL != key_buffer) free(key_buffer);
+    key_buffer = NULL;
+    key_buffer_len = 0;
 
     OBJ_DESTRUCT(&keyval_mutex);