Don't hairpin outgoing requests
Merge pull request #705 from Metaswitch/issue704

[Reviewer Andy] Don't hairpin outgoing requests
Log REGISTER and SUBSCRIBE/NOTIFY transactions to SAS correctly
Code review mark-ups
cpp-common update
Merge pull request #713 from Metaswitch/cpp_update

[No reviewer] Update cpp-common
Take master cpp-common
Code review mark-ups
Take lastest sas-client
Merge branch 'iss709' into dev
Change Metaswitch submodule refs to ClearwaterCore