Regression: Graceful shutdowns for GremlinServer (#2712) #289

Job	Run time
smoke	3m 21s
gremlin-server default	22m 29s
mvn clean install - jdk17	13m 45s
gremlin-console	6m 33s
cache gremlin-server docker image	1m 52s
gremlin-server unified	23m 14s
mvn clean install - jdk11	18m 3s
mvn clean install - jdk8	19m 50s
neo4j-gremlin	8m 56s
spark core (ubuntu-latest)	12m 41s
spark gryo (ubuntu-latest)	9m 35s
spark core (windows-latest)	3m 53s
spark gryo (windows-latest)	3m 33s
python	5m 48s
javascript (ubuntu-latest)	5m 17s
go	5m 25s
.NET	6m 14s
gremlin-driver	3m 57s
	2h 54m 26s

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