Add support for duplicate validation to list attributes
Merge pull request #390 from ctomc/validators

Add support for duplicate validation to list attributes
[WFCORE-457] Attribute groups -- the basics
[WFCORE-457] Attribute groups -- xml persistence
[WFCORE-457] Attribute groups -- reflect in sorting of read-resource-description and read-operation-description output
[WFCORE-457] Attribute groups -- sort attributes in read-resource responses by group and then by name
[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.
[WFCORE-484] Remove no longer needed cast to AbstractResourceRegistration
[WFCORE-123] Allow clear to be defined as a color-map attribute.
Trim elements in sequence options