[Jersey2] Fix code generation of 'registerDiscriminator' method for l…

…arge models (#6535)

* Mustache template should use invokerPackage tag to generate import

* fix typo, fix script issue, add log statement for troubleshooting

* Add java jersey2 samples with OpenAPI doc that has HTTP signature security scheme

* Add sample for Java jersey2 and HTTP signature scheme

* Add unit test for oneOf schema deserialization

* Add unit test for oneOf schema deserialization

* Add log statements

* Add profile for jersey2

* Temporarily disable unit test

* Temporarily disable unit test

* support for discriminator in jersey2

* fix typo in pom.xml

* disable unit test because jersey2 deserialization is broken

* disable unit test because jersey2 deserialization is broken

* fix duplicate jersey2 samples

* fix duplicate jersey2 samples

* Add code comments

* fix duplicate artifact id

* fix duplicate jersey2 samples

* run samples scripts

* resolve merge conflicts

* Add unit tests

* fix unit tests

* continue implementation of discriminator lookup

* throw deserialization exception when value is null and schema does not allow null value

* continue implementation of compose schema

* continue implementation of compose schema

* continue implementation of compose schema

* Add more unit tests

* Add unit tests for anyOf

* Add unit tests

* Fix 'method too big' error with generated code

* resolve merge conflicts

Co-authored-by: Vikrant Balyan (vvb) <[email protected]>