Add the log for missing repo

Author: sswguo

db/cassandra/src/main/java/org/commonjava/indy/cassandra/data/CassandraStoreDataManager.java

@@ -268,6 +268,7 @@ public Set<Group> affectedBy( Collection<StoreKey> keys ) throws IndyDataExcepti
 
                             if ( store == null )
                             {
+                                logger.error( "Error: the group {} does not exist as affected by for store {}", gKey, key );
                                 processed.add( gKey );
                                 continue;
                             }