[ES-1911] Added Schema validation for identitityData #376

Job	Run time
build-maven-esignet-mock-services / maven-build	1m 2s
mock-relying-party-service / build-dockers	10s
mock-relying-party-ui / build-dockers	46s
publish_to_nexus	0s
sonar_analysis	0s
mock-identity-system / build-dockers	23s
	2m 21s

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