Consider moving Arquillian profiles to root pom.xml

We have three Arquillian profiles (for managed, remote and ipv6-managed) present in the pom of nearly every test that uses Arquillian. I suspect they can all be identical and thus placed int he root pom.xml. This should simplify maintenance and will ensure any fixes to this config are made throughout.

The problem is that we may have legitimate reasons for this config to differ for some tests. Maybe we could use overrides in these cases.

Assigning to Tom for his input.