Add some test clean up logic for after tests
1. TestInstanceOperation.java (line 175)
- Added missing deleteCluster(CLUSTER_NAME) in @AfterClass
2. TestTopologyMigration.java (line 130)
- Added missing deleteCluster(CLUSTER_NAME) in @AfterClass
3. TestCustomizedViewAggregation.java (lines 71, 95, 172)
- Added _clusterName field to store cluster name
- Updated @BeforeClass to use _clusterName
- Added deleteCluster(_clusterName) in @AfterClass

Helix is part of the Apache Software Foundation.
Project page: http://helix.apache.org/
Mailing list: http://helix.apache.org/mail-lists.html
mvn clean install -Dmaven.test.skip.exec=true
Helix is a generic cluster management framework used for automatic management of partitioned, replicated and distributed resources hosted on a cluster of nodes. Helix provides the following features:
Helix UI has been tested to run well on these versions of node and yarn:
"engines": { "node": "~14.17.5", "yarn": "^1.22.18" },