improve test

Author: Yingjian Wu

metacat-functional-tests/src/functionalTest/groovy/com/netflix/metacat/ParentChildRelMetadataServiceSpec.groovy

@@ -167,7 +167,6 @@ class ParentChildRelMetadataServiceSpec extends Specification{
         def grandChild = QualifiedName.ofTable(catalog, database, "gc")
         def grandChildUUID = "gc_uuid"
         def type = "clone"
-        service.createParentChildRelation(parent, parentUUID, child, childUUID, type)
 
         when:
         service.createParentChildRelation(child, childUUID, grandChild, grandChildUUID, type)