Update hibernate core to v5.6.15.Final

This MR contains the following updates:

Package	Type	Update	Change
org.hibernate:hibernate-envers (source)	build	patch	5.6.14.Final -> 5.6.15.Final
org.hibernate:hibernate-entitymanager (source)	build	patch	5.6.14.Final -> 5.6.15.Final
org.hibernate:hibernate-core (source)	build	patch	5.6.14.Final -> 5.6.15.Final
org.hibernate:hibernate-jpamodelgen (source)	provided	patch	5.6.14.Final -> 5.6.15.Final

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Release Notes

hibernate/hibernate-orm

v5.6.15.Final

Compare Source

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