[WFCORE-193] : Move org.jboss.as.test.smoke.mgmt.servermodule tests from full to core.

Removing sar deployments.
Simplifying test and updating pom with required dependencies.

Jira: https://issues.jboss.org/browse/WFCORE-193
This one also can do without the "ServerInModule" bit and it's not about "Startup" any more either. :)