Ticket 48964 - should not free repl name after purging changelog

Bug Description:  The previous commit for this ticket incorrectly
                  freed a replica struct const char.  There was also
                  a minor converity issue.

Fix Description:  Do not free the repl_name after purging, and do
                  not check if "replica" is NULL when creating the
                  purge data.

https://fedorahosted.org/389/ticket/48964

Reviewed by: tbordaz(Thanks!)

(cherry picked from commit 017469a1a055da03fc3fb4b34a7732611b7bd2b0)

ldap/servers/plugins/replication/cl5_api.c

@@ -6888,7 +6888,6 @@ cl5CleanRUV(ReplicaId rid){
 static void free_purge_data(cleanruv_purge_data *purge_data)
 {
     slapi_ch_free_string(&purge_data->replGen);
-    slapi_ch_free_string(&purge_data->replName);
     slapi_ch_free((void **)&purge_data);
 }
 

ldap/servers/plugins/replication/repl5_replica_config.c

@@ -1245,14 +1245,12 @@ replica_execute_cleanruv_task (Object *r, ReplicaId rid, char *returntext /* not
 	/*
 	 * Now purge the changelog.  The purging thread will free the purge_data
 	 */
-	if (replica){
-		purge_data = (cleanruv_purge_data*)slapi_ch_calloc(1, sizeof(cleanruv_purge_data));
-		purge_data->cleaned_rid = rid;
-		purge_data->suffix_sdn = replica_get_root(replica);
-		purge_data->replName = (char *)replica_get_name(replica);
-		purge_data->replGen = replica_get_generation(replica);
-		trigger_cl_purging(purge_data);
-	}
+	purge_data = (cleanruv_purge_data*)slapi_ch_calloc(1, sizeof(cleanruv_purge_data));
+	purge_data->cleaned_rid = rid;
+	purge_data->suffix_sdn = replica_get_root(replica);
+	purge_data->replName = (char *)replica_get_name(replica);
+	purge_data->replGen = replica_get_generation(replica);
+	trigger_cl_purging(purge_data);
 
 	if (rc != RUV_SUCCESS){
 		slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name, "cleanruv_task: task failed(%d)\n",rc);