rename plugin/pkg/client/auth/plugins.go package name to auth
add the plugin import line in client-gen
update import_known_versions for release_1_5 clientset
change copy.sh
Automatic merge from submit-queue
unify available api group versions in our scripts
There are currently many parallel lists of available group versions with slightly different syntaxes in each one. This collapses them into a single list for us to maintain.
Also caught spots where the lists didn't match before.
@sttts @ncdc
Automatic merge from submit-queue
Staging 1.5 client
Created the 1.5 folder and remove the 1.4 folder in the staging area in the master branch.
Content of kubernetes/client-go/1.4 will be pulled from the kubernetes/kubernetes 1.4 branch (https://github.com/kubernetes/contrib/pull/1719)
