Added authorization operations

Added authorization operations and ability to get connection by authorization token.
I was hoping to be able to overload, but there is already a method there.

https://github.com/skavanagh/openshift-java-client/blob/e1b75bf5be54c7f71c2ba289483bf587b538d3f2/src/main/java/com/openshift/client/OpenShiftConnectionFactory.java#L76