[WFCORE-275] : Moving some RBAC testing to core.

Using SetupTask to configure rbac extension/subsystem
Using SetupTask to add deploymentScanner extension.
Allowing debug option to be passed to the server in test-runner.
Merge pull request #360 from ehsavoie/WFCORE-275

[WFCORE-275] : Moving some RBAC testing to core.