[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 class javadoc isn't true any longer. Probably untrue even in AS 7.0.0.GA.