Fix impersonation tests to work properly
Current tests worked correctly only with a primed ccache, ie, by side effect.
Fix them to work regardless of status and use the isolate memory ccache
feature of PR#38 to insure no side effects.
Signed-off-by: Simo Sorce <simo@redhat.com>
[rharwood@redhat.com Reflow commit message]
Reviewed-by: Robbie Harwood <rharwood@redhat.com>
Closes #42