Gh-3334: Fix Gremlin Reusing Accumulo Iterators #1446

Job	Run time
Tests (Core, :gaffer2,:core,:access,:cache,:common-util,:data,:exception,:graph,:operation,:seria...	3m 39s
Tests (Accumulo, :accumulo-store,:accumulo-rest)	26m 44s
Tests (Federated-And-Map, :integration-test,:federated-store,:map-store,:map-rest,:simple-federat...	25m 4s
Tests (REST, :rest-api,:common-rest,:spring-rest,:core-rest,:store-implementation,:proxy-store)	6m 46s
Tests (Examples, :example,:basic,:basic-model,:basic-rest,:road-traffic,:road-traffic-model,:road...	3m 23s
Tests (Big-Data-Libraries, :flink-library,:hdfs-library,:spark,:spark-library,:spark-accumulo-lib...	8m 5s
Tests (Time-Library, :library,:time-library)	1m 20s
Tests (Caches, :cache-library,:sketches-library,:bitmap-library,:hazelcast-cache-service,:jcs-cac...	2m 2s
	1h 17m 3s

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