chore(deps): update to Fabric8 client 7.4.0 (#2937) #5529

Job	Run time
sample_operators_tests (sample-operators/leader-election)	3m 47s
sample_operators_tests (sample-operators/tomcat-operator)	3m 14s
sample_operators_tests (sample-operators/webpage)	3m 22s
sample_operators_tests (sample-operators/mysql-schema)	3m 1s
	13m 24s

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