Attempt to support JDK 17

[lvitaly]

Those changes were made over two years ago and have been successful in production since then. The newer Kryo version is already available there, so it is worth updating to the latest one. @npgall, what do you think?

[lvitaly]

In this branch, only a few tests fail.

nix-shell -p "(maven.override { jdk = zulu17; })"

[ERROR] Failures:
[ERROR]   ReflectiveAttributeTest.testEqualsAndHashCode:76 EqualsVerifier found a problem in class com.googlecode.cqengine.attribute.ReflectiveAttribute.
-> Unsupported class file major version 65

For more information, go to: http://www.jqno.nl/equalsverifier/errormessages
[ERROR]   PartialIndexTest.testEqualsAndHashCode_PartialDiskIndex:60 EqualsVerifier found a problem in class com.googlecode.cqengine.index.disk.PartialDiskIndex.
-> Unsupported class file major version 65

For more information, go to: http://www.jqno.nl/equalsverifier/errormessages
[ERROR]   PartialIndexTest.testEqualsAndHashCode_PartialOffHeapIndex:69 EqualsVerifier found a problem in class com.googlecode.cqengine.index.offheap.PartialOffHeapIndex.
-> Unsupported class file major version 65

For more information, go to: http://www.jqno.nl/equalsverifier/errormessages
[ERROR]   DiskPersistenceTest.testEqualsAndHashCode:117 EqualsVerifier found a problem in class com.googlecode.cqengine.persistence.disk.DiskPersistence.
-> Unsupported class file major version 65

For more information, go to: http://www.jqno.nl/equalsverifier/errormessages
[ERROR]   OffHeapPersistenceTest.testEqualsAndHashCode:105 EqualsVerifier found a problem in class com.googlecode.cqengine.persistence.offheap.OffHeapPersistence.
-> Unsupported class file major version 65

For more information, go to: http://www.jqno.nl/equalsverifier/errormessages
[ERROR]   QueriesEqualsAndHashCodeTest.testQueryClass:81 EqualsVerifier found a problem in class com.googlecode.cqengine.query.simple.StringMatchesRegex.
-> Unsupported class file major version 65