Remove unused authentication CLI options
Remove unused authentication CLI options

These were copied from ceilometer where they are used for things like
the glance pollster. Ironic doesn't need these.

Change-Id: I93f2a2f3a5a93e9c1ef53514eece7f7ce8c5bffa

tuskar/tuskar,rdo-management/tuskar,rdo-management/tuskar,rdo-management/tuskar