Set up our logging functionality earlier
cpp-common update
Merge pull request #144 from Metaswitch/cpp_update

[No reviewer] cpp-common update
Take master cpp-common
Take latest cpp-common and sas-client
Pull in latest cpp-common
Merge pull request #143 from Metaswitch/iss7

[Reviewer: Rob] Set up our logging functionality earlier
Take latest cpp-common
Update cpp-common
Change Metaswitch submodule refs to ClearwaterCore