Confirm escalation is not possible via authorization to RBAC proxy
Confirm escalation is not possible via authorization to RBAC proxy

This change adds a test that exercises the authorization to RBAC
proxy to make sure that escalation is not possible.  This confirms
that the internal impersonation code is working.  It also checks to
make sure that the group resource returned matches the authorization
resource (and not the proxied RBAC resource).

Signed-off-by: Monis Khan <19f7b2d00144930eab99c4cfd2a8d2d2a225ef67@redhat.com>

xiuwang/origin,sjug/origin,Miciah/origin,mkumatag/origin,mkumatag/origin,jeremyeder/origin,JacobTanenbaum/origin,gabemontero/origin,tnozicka/origin,Miciah/origin,jim-minter/origin,coreydaley/origin,sallyom/origin,tnozicka/origin,anpingli/origin,gabemontero/origin,jsafrane/origin,tnozicka/origin,akram/origin,jeremyeder/origin,jeremyeder/origin,anpingli/origin,enj/origin,pweil-/origin,akram/origin,openshift/origin,mkumatag/origin,ironcladlou/origin,pweil-/origin,pecameron/origin,sdminonne/origin,coreydaley/origin,akram/origin,spadgett/origin,csrwng/origin,spadgett/origin,pecameron/origin,dinhxuanvu/origin,sjug/origin,xiuwang/origin,xiuwang/origin,nak3/origin,bparees/origin,ironcladlou/origin,ingvagabund/origin,tnozicka/origin,mahak/origin,gabemontero/origin,JacobTanenbaum/origin,mfojtik/origin,spadgett/origin,mahak/origin,tnozicka/origin,spadgett/origin,mfojtik/origin,jsafrane/origin,soltysh/origin,anpingli/origin,spadgett/origin,dinhxuanvu/origin,deads2k/origin,dinhxuanvu/origin,enj/origin,sdminonne/origin,tnozicka/origin,ironcladlou/origin,sferich888/origin,sferich888/origin,deads2k/origin,mahak/origin,sjug/origin,bparees/origin,sallyom/origin,openshift/origin,coreydaley/origin,soltysh/origin,pecameron/origin,deads2k/origin,JacobTanenbaum/origin,jeremyeder/origin,jsafrane/origin,jim-minter/origin,sferich888/origin,nak3/origin,Miciah/origin,dinhxuanvu/origin,jim-minter/origin,dinhxuanvu/origin,mfojtik/origin,ingvagabund/origin,hroyrh/origin,hroyrh/origin,pweil-/origin,soltysh/origin,enj/origin,ingvagabund/origin,csrwng/origin,sallyom/origin,csrwng/origin,bparees/origin,sdminonne/origin,openshift/origin,nak3/origin,hroyrh/origin,jeremyeder/origin