Changelog MIG V2.3

Updated mig-t to v1.3.63 (changelog is available in the release page of mig-t)
Updated Testplan spid-cie-oidc to v2.3 including:
Revision of PullRequest #193 and most of #194 (missing metadata_policy operators) in spid-cie-oidc-docs
Revision of tests from the testplan, primarily focusing on messages related to Authentication, UserInfo, and Trust Marks
Fixed bugs in the included spid-cie-oidc-java implementation
Added two arguments to testplan_to_mr script:
- --justFill, to fill tests with information from config_testplan file
- --django, to add the session name retrieved from the hr testplan in the test

The following table reports a concise summary of the coverage provided by our testplan compared to the OIDC Federation Specification 1.0 - draft 33:

Feature	Covered by MIG
Entity statement request	y
Entity statement response	y
Metadata policy	y
Federation policy operators	n
Federation policy constraints	y
Trust marks claims	y
Trust marks delegation	n
Trust mark validation	y
Fetch entity statement Request	n
Fetch entity statement Response	y
Resolve entity statement Request	n
Resolve entity statement Response	y
Subordinate Listings Request	n
Subordinate Listings Response	n
Trust mark status request	n
Trust mark status response	y
Trust Marked Entities Listing Request	n
Trust Marked Entities Listing Response	n
Trust Mark Request	n
Trust Mark Response	n
Federation Historical Keys Request	n
Federation Historical Keys Response	n
Error responses from federation endpoints	y
Federation Entity Configuration Request	n
Federation Entity Configuration Response	y
OIDC client registration automatic registration	n
Authentication error response	y

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