Metadata bucket not getting cleared even when all handlers are undeployed

./testrunner -i /tmp/testexec.47573.ini -p get-cbcollect-info=True,GROUP=multihandler_multibucket -t eventing.eventing_multihandler.EventingMultiHandler.test_multiple_handle_multiple_buckets_preload,GROUP=multihandler_multibucket,worker_count=3,reset_services=True,dataset=default,skip_cleanup=True,num_handlers=15,groups=simple,nodes_init=4,deploy_handler=15,num_dst_buckets=0,handler_code=handler_code/ABO/insert.js,num_pause=10,num_src_buckets=10,sequential=True,services_init=kv-eventing-index-n1ql,get-cbcollect-info=True