Add UT repro
Check that the URI returned from homestead parses, reject request if not
Add test for SIPS URI
Markups - refactor to move policing into get_scscf, and change return code to 480
Improve commenting to get_scscf
Remove duff trace
Correct commenting in testcase
Re-instate some logs
Merge pull request #590 from Metaswitch/issue584

[Reviewer: Ellie][From: Alex] Fix for issue 584