Update storm_topology_nodes relationshipCategory from ASSOCIATION to AGGREGATION
Fix the following UT failures:
_Failed tests:
AtlasRelationshipStoreHardDeleteV1Test>AtlasRelationshipStoreV1Test.testDepartmentEmployeeEntitiesUsingRelationship:172 expected:<null> but was:<[]>
AtlasRelationshipStoreSoftDeleteV1Test>AtlasRelationshipStoreV1Test.testDepartmentEmployeeEntitiesUsingRelationship:172 expected:<null> but was:<[]>_
Fix coverity scan issues flagged in last report related to ATLAS-1959