Add checkstyle to plugin-shell

Change-Id: I0f1f3bee18eb8b706ae0e04fc540cf1ad1523a35
Signed-off-by: Sam Hague <shague@redhat.com>
Add checkstyle to utils.config

Change-Id: I31935e1ef583e3dd8d7465330f05db3db96532cb
Signed-off-by: Sam Hague <shague@redhat.com>
Add checkstyle to utils.mdsal-openflow

Change-Id: Ibe8d0d9fef466ce02a2e5988cc8e28a9d709e609
Signed-off-by: Sam Hague <shague@redhat.com>
Merge changes Ibe8d0d9f,I31935e1e,I0f1f3bee

* changes:
  Add checkstyle to utils.mdsal-openflow
  Add checkstyle to utils.config
  Add checkstyle to plugin-shell