enabling tests of common modules for java connectors #254

Job	Run time
initiate-java-modules	32s
test (kafka-connect-azure-eventhubs)	50s
test (kafka-connect-common)	48s
test (kafka-connect-gcp-common)	51s
test (kafka-connect-gcp-pubsub)	1m 2s
test (kafka-connect-query-language)	46s
build-and-cache	0s
jar-dependency-check	0s
	4m 49s

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