Do not deploy test suite modules

3 modules inside Core test suite uses wildfly-core-parent as their parent instead of wildfly-core-testsuite:

• shared
• test-runner
• vault-test-feature-pack

One consequence is that when Core is released, these 3 artifacts are included in the release while they should not be (no other test suite modules is part of a release)

They do not use wildfly-core-testsuite for good reason (cyclic dependencies, etc.) but they must be flagged to skip maven deployment with maven.deploy.skip set to true.