OpenShift currently uses '-n', so opening up the potential for downstream
to set a short namespace. However, this should only be used in general for
commands that want to work across namespaces frequently - such as admin
level operations on entire namespaces like quota or cleanup behavior where
you have permissions and need to rapidly switch.
There is no need to check for an empty string and call StringVar or
StringVarP depending on the case, since StringVar is essentially the
same as a call to StringVarP with an empty string.
This turns 6 lines of code back into 1.
Remove the TODO comments since removing the short flags will no longer
simplify this code significantly.