Add get_u32_from_avp function
Don't auto-copy sessions from request to response
Add mockdiameterstack from Homestead
Moved mockdiameterstack.hpp to cpp-common from homestead
Correct missing endif in mockdiameterstack.hpp
Merge branch 'Move_Mockdiameterstack' into cedar-changes

Conflicts:
	test_utils/mockdiameterstack.hpp
Correct controller->handler in mockdiameterstack.cpp
Self Review
Remove erroneous mockdiameterstack.hpp from include directory
Merge pull request #155 from Metaswitch/cedar-changes

[Reviewer: Andy] Cedar changes