Use __set_blah functions and pass in all columns rather than no columns to delete whole row
Updated cpp-common
Merge pull request #61 from Metaswitch/sub_update

[No reviewer] Updated cpp-common
Set qop to auth if it's empty
Update comment
Merge pull request #63 from Metaswitch/iss62

[Reviewer: Matt] Set qop to auth if it's empty
Code review markups
Merge branch 'rtr_cache' into sto536_cache_fixes
Update cpp-common
Fix up mock cache
Merge branch 'sto536_cache_fixes' of github.com:Metaswitch/homestead into sto536_cache_fixes
Fix typo, fix up UTs
Merge remote-tracking branch 'origin/rtr_cache' into sto536_handlers
Merge remote-tracking branch 'origin/sto536_cache_fixes' into sto536_handlers
Allow retrieving the associated IMPUs for multiple IMPIs at once
Allow dissociation of multiple IMPIs from an IRS at once
Merge branch 'sto536_cache_fixes' into rtr_cache

Conflicts:
	src/cache.cpp
Get cache back to 100% UT coverage
Merge remote-tracking branch 'origin/rtr_cache' into sto536_handlers
Change std::set back to std::vector