Description of problem:
after an ipa server or client is uninstalled, sssd.conf is still available
configured with ipa domains

From IRC conversations:
<sgallagh> It occurs to me that this may be a side-effect of the fact that SSSD
is no longer including sssd.conf by default (it was too confusing to ship a
non-functional default config)
<sgallagh> So maybe the client script doesn't know what to do on uninstall if
there was no file there before installation?
<sgallagh> rcrit: We should probably delete it
<sgallagh> Or at least rename it to sssd.conf.deleted or something like that
<sgallagh> So the SSSD will fail with "no configuration" instead of partially
starting up and then discovering there's no keytab, etc.


Version-Release number of selected component (if applicable):
ipa-client-2.2.0-12.el6.x86_64
ipa-server-2.2.0-12.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. Install ipa server, client
2. uninstall both

Actual results:
sssd.conf with configured IPA domain is still available

Expected results:
after uninstall, no sssd.conf should be available.

Additional info: