Update fakecurl to deal with the new curl options and info we use
Fix memory leak
Implement the debug callback in FakeCurl to improve coverage
Exclude the chronos SasLogger from code coverage (as it is currently too closely coupled with libevhtp to unit test)
Explain why we implement the debug callback in FakeCurl
Merge pull request #203 from Metaswitch/fix_uts

[No review required] Fix broken UTs