Remove paxexam ExternalGitTest

Now covered by smoke/embedded/RemoteGitRepositoryTest
Optimise profile overlay logging
Revisit git shared counter increments

Only increment on successful x-git-receive-pack-result x-git-upload-pack-result response
Unignore basic arquillian tests
Migrate ExtendedCreateChildContainerTest to Arquillian
Migrate ExtendedJoinTest to Arquillian
Migrate ResolverTest to Arquillian