The goals deploy-artifact and undeploy-artifact are not aware of artifact classifiers. Imagine the following constellation:

Project A:

packaging: war
attaches the classes as a jar with classifier classes

Project B:

has a compile dependency to a-classes.jar
needs to deploy the artifact a.war in the integration test phase

Problem:
Since the compile dependency to the classes jar has been specified first, the plugin will deploy the classes jar instead of the war which breaks the integration tests.

I will send a pull request for this fix.

See https://github.com/wildfly/wildfly-maven-plugin/issues/73