Update freeDiameter
Merge pull request #9 from Metaswitch/free_diameter_update

[No reviewer] Update freeDiameter
Various UT fixes
Merge pull request #10 from Metaswitch/various-ut-fixes

Reviewer Rob - Various UT fixes
first attempt to integrate new diameter api
fix merge conflicts and fix dummy peer manager to take a diameter_stack
Merge pull request #11 from Metaswitch/new_diameterstack_api

Reviewer Andy: Integrate Ralf with new diameterstack API