Read Session-Expires header from transmitted as well as received INVITEs
Don't try to delete authentication vectors we don't have
Rework FakeLogger to be more usable.
Remove pointless meddling with logging level
Take cpp-common with new test loggers
Prevent memory leaks in the AnalyticsLogger
Remove unnecessary take_over() calls
Update cpp-common
Merge pull request #578 from Metaswitch/memcached_deletion_fix

[Reviewer: Mike] Don't try to delete authentication vectors we don't have
Add commit
Merge branch 'dev' into fakelogger

Conflicts:
	sprout/ut/hssconnection_test.cpp
Updates after review
Merge pull request #619 from Metaswitch/commit_log

[Reviewer: Alex] Add commit
Make ConnectionPool loop more tightly in UTs to speed them up
Take latest cpp-common fakelogger
Merge pull request #620 from Metaswitch/slightly_faster_uts

[Reviewer: Mike] Make ConnectionPool loop more tightly in UTs to speed them up
Remove fakelogger.hpp from tests that don't need it
Clean up AnalyticsLogger based on code review feedback
Merge pull request #537 from Metaswitch/rf_bugs2

Reviewer Andy: Read Session-Expires header from transmitted as well as received INVITEs
Update cpp-common