chore: update to Fabric8 7.0-SNAPSHOT for testing #4790

Job	Run time
check_format_and_unit_tests	3m 3s
special_integration_tests (11)	3m 31s
special_integration_tests (17)	2m 19s
httpclient-tests (jdk) / integration_tests	21m 13s
httpclient-tests (jetty) / integration_tests	20m 40s
httpclient-tests (vertx) / integration_tests	20m 51s
integration_tests (11, 1.30.3) / integration_tests	20m 7s
integration_tests (11, 1.31.0) / integration_tests	21m 42s
integration_tests (11, v1.28.12) / integration_tests	20m 2s
integration_tests (11, v1.29.7) / integration_tests	20m 39s
integration_tests (17, 1.30.3) / integration_tests	21m 1s
integration_tests (17, 1.31.0) / integration_tests	20m 36s
integration_tests (17, v1.28.12) / integration_tests	19m 44s
integration_tests (17, v1.29.7) / integration_tests	19m 42s
	3h 55m 10s

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