lock in all container version and correct keycloak pod spec

[dustinblack]

This PR corrects two issues with the existing operator configs.

• All dependency pod versions are now locked into explicit release tags instead of using the :latest tags.
• The pod spec for the keycloak pod has been updated to pass the start argument to the pod, which corrects problems starting keycloak pods from the upstream repository.

Fixes #18

[jesperpedersen]

We have to mindful that we need to change these versions once a new release is out...