[NO ISSUE][OTH] Force drop dataset on rebalance

- user model changes: no
- storage format changes: no
- interface changes: no

Details:
When doing a rebalance and cleaning up the datasets,
pass the force flag to force drop the datasets.

Change-Id: Icfa4c99e5c5185d235aff89f9d34d3ff33e8769a
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/10124
Reviewed-by: Murtadha Hubail <mhubail@apache.org>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
diff --git a/asterixdb/asterix-app/src/main/java/org/apache/asterix/utils/RebalanceUtil.java b/asterixdb/asterix-app/src/main/java/org/apache/asterix/utils/RebalanceUtil.java
index 7ad90ad..429cda9 100644
--- a/asterixdb/asterix-app/src/main/java/org/apache/asterix/utils/RebalanceUtil.java
+++ b/asterixdb/asterix-app/src/main/java/org/apache/asterix/utils/RebalanceUtil.java
@@ -419,7 +419,7 @@
             // drop dataset entry from metadata
             runMetadataTransaction(metadataProvider,
                     () -> MetadataManager.INSTANCE.dropDataset(metadataProvider.getMetadataTxnContext(),
-                            dataset.getDataverseName(), dataset.getDatasetName(), false));
+                            dataset.getDataverseName(), dataset.getDatasetName(), true));
             MetadataManager.INSTANCE.commitTransaction(metadataProvider.getMetadataTxnContext());
             // try to drop the dataset's node group
             runMetadataTransaction(metadataProvider, () -> tryDropDatasetNodegroup(dataset, metadataProvider));