feat(rest.identity.provider): Added REST Identity API V2

[salvatore-coppola]

This PR add a new version of REST Identity levereging the new IdentityService and PasswordStrenghtVerificationService

[MMaiero]

Something is broken in the PR as it fails with the following error:

[INFO] --- tycho-compiler-plugin:1.7.0:compile (default-compile) @ org.eclipse.kura.request.handler.jaxrs ---
[WARNING] Parameter 'useProjectSettings' is set to true, but preferences file '/home/jenkins/agent/workspace/multibranch_PR-5201/kura/kura/org.eclipse.kura.request.handler.jaxrs/.settings/org.eclipse.jdt.core.prefs' could not be found!
[INFO] Compiling 8 source files to /home/jenkins/agent/workspace/multibranch_PR-5201/kura/kura/org.eclipse.kura.request.handler.jaxrs/target/classes
[WARNING] /home/jenkins/agent/workspace/multibranch_PR-5201/kura/kura/org.eclipse.kura.request.handler.jaxrs/src/main/java/org/eclipse/kura/request/handler/jaxrs/DefaultExceptionHandler.java:[63] 
	final Response response = e.getResponse();
	      ^^^^^^^^
Response is a raw type. References to generic type Response<T> should be parameterized

Please check

[MMaiero]

better, but still issues building

[salvatore-coppola]

Merged in any case because failed tests are not related to PR.