Add comment for warning

Author: asloobq

src/main/java/com/uid2/operator/store/CloudSyncOptOutStore.java

@@ -612,6 +612,7 @@ private OptOutStoreSnapshot updateIndexInternal(IndexUpdateContext iuc) {
                 } else if (numPartitions > 1) {
                     if (this.iteration != 0) {
                         final String errorMsg = "Should not load more than 1 partition at a time, unless during service bootstrap. Current iteration " + this.iteration;
+                        // Leaving this as a warning as this condition is true in production
                         LOGGER.warn(errorMsg);
                     }
                     return this.processPartitions(iuc);