HM-448:Adding test case for negative scenario for reporting unavailable device on TMC-SDP.

Overview

• SS-119 requires verification if devices gets unavailable in SDP TMC-SDP pairwise testing.
• TMC-SDP: In the test case implementation , check is made to confirm if some of the component of SDP gets unavailable then SDP reports that to TMC.

Changes

• Implemented BDD test cases Unavailability in TMC-SDP.
• Updated relevant documentation and comments for clarity.
• Integration with XRay for comprehensive test coverage.

Related Links

• XTP-34890: Verify If SDP subarray reports TMC if some of its components get unavailable due to some reasons.

Additional checklist

• No conflicts with the master branch.
• Merge Request title is appropriate.
• Unit and integration tests have been added, and existing test cases are passing.
• Variable and Function names state the purpose.
• There are no commented-out code or print/debug statements.
• Logs have been added where necessary.
• Exceptions are handled wherever required.