OIDCClaimsRequest.parse(String) should include a minimal exception message when the JSON is invalid

[Yavor Vasilev]

Otherwise may cause an unchecked exception in AuthenticationRequest.parse:

Illegal char(s) in description, see RFC 6749, section 5.2
java.lang.IllegalArgumentException: Illegal char(s) in description, see RFC 6749, section 5.2

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[Yavor Vasilev]

Fixed: 06c2c99dd37ca7a059f40ccbdf5d8b0c6d807bc6