chore: bump fabric8 client to 7.5.2 #6162

Job	Run time
sample_operators_tests (sample-operators/webpage)	3m 27s
sample_operators_tests (sample-operators/tomcat-operator)	3m 5s
sample_operators_tests (sample-operators/mysql-schema)	3m 3s
sample_operators_tests (sample-operators/leader-election)	3m 35s
	13m 10s

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