Add the standard UT logger to Ralf (so it honours NOISY=T)
Take latest fakelogger branch of cpp-common
Merge remote-tracking branch 'origin/dev' into fakelogger (and take master cpp-common)

Conflicts:
	modules/cpp-common
Merge pull request #75 from Metaswitch/fakelogger

[Reviewer: Andy] Rework the fake logger used in UTs