MSC_Tests: Support wildcarded endpoints

At the moment the testsuite is unable to detect when the call agent
performs a CRCX request with a wildcarded endpoint.

- Set a default endpoint name in cpars in case the MSC does
  a CRCX request with wildcarded endpoint name.

- Detect if the MSC supplied a wildcarded endpoint name. Do
  not overwrite the default setting in cpars then.

- Attach the endpoint name as Z: parameter in the response so
  that the MSC knows which endpoint to use. (Unconditional,
  does not harm on non wildcarded requests)

Change-Id: I0efeae0f8a6e98deb843e79648f84a262f1d98f8
Related: OS#2710
2 files changed