chore: bump version to 5.1.4-SNAPSHOT #5617

Job	Run time
sample_operators_tests (sample-operators/tomcat-operator)	3m 33s
sample_operators_tests (sample-operators/webpage)	3m 19s
sample_operators_tests (sample-operators/leader-election)	3m 31s
sample_operators_tests (sample-operators/mysql-schema)	3m 35s
	13m 58s

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