Update metadata-mgmt app to use lightblue-client
Move RolesServlet to apps-common
Update to use newly published client version
Move location of RolesServlet to apps-common
Remove unneeded class (this lives in lightblue-client now)
Fix servlet mapping
Merge pull request #21 from derek63/uselightblueclient

Update metadata-mgmt app to use lightblue-client