[keycloak-dev] Run testsuite with distribution by default

[Stian Thorgersen]

I propose we change the default build to also build the server
distribution. We should also make the Arquillian testsuite use the server
distribution by default and not the embedded Undertow version. The embedded
Undertow version should only be used when running tests from within the IDE.

It should only add ~2 min to a full build.

Any objections/comments?