Description of problem:
ipa-client-install --uninstall starts nscd service, but it was stopped before
uninstall.

This may cause problem if hostname is changed after uninstall, but nscd has
cached some information and user doesn't know that nscd is running now.

ipa-client-install is used with realmd component, we are changing the hostname
in realmd tests.Here is the scenario that cause problems:

change hostname
realm join
realm leave
restore hostname

Next run of this scenarion fails (realm join doesn't work) if nscd is
installed, because realm leave (ipa-client-install --uninstall) starts nscd
service and nobody knows that.

Version-Release number of selected component (if applicable):
ipa-client-3.2.1-1.el7

How reproducible:
always

Steps to Reproduce:
1.install nscd service
2.make sure that it is stopped
3.run ipa-client-install
4.run ipa-client-install --uninstall
5. check status of nscd service

Actual results:
nscd running

Expected results:
nscd is stopped

Additional info:
[test]service nscd status
Redirecting to /bin/systemctl status  nscd.service
nscd.service - Name Service Cache Daemon
   Loaded: loaded (/usr/lib/systemd/system/nscd.service; disabled)
   Active: inactive (dead) since Wed 2013-07-17 02:34:40 EDT; 44s ago
 Main PID: 6450 (code=exited, status=0/SUCCESS)
   CGroup: name=systemd:/system/nscd.service

Jul 17 02:32:00 client.ipa.baseos.qe systemd[1]: Starting Name Service
Cache....
Jul 17 02:32:00 client.ipa.baseos.qe systemd[1]: Started Name Service Cache
....
Jul 17 02:32:00 client.ipa.baseos.qe nscd[6450]: 6450 cannot stat() file
`/e...y
Jul 17 02:32:00 client.ipa.baseos.qe nscd[6450]: 6450 Access Vector Cache
(A...d
Jul 17 02:34:40 client.security.baseos.qe systemd[1]: Stopping Name Service
C...
Jul 17 02:34:40 client.security.baseos.qe systemd[1]: Stopped Name Service
Ca...
Jul 17 02:35:07 client.ipa.baseos.qe systemd[1]: Stopped Name Service Cache
....
Jul 17 02:35:08 client.ipa.baseos.qe systemd[1]: Stopped Name Service Cache
....
[test]ipa-client-install --uninstall --unattended
Unenrolling client from IPA server
Removing Kerberos service principals from /etc/krb5.keytab
Disabling client Kerberos and LDAP configurations
Restoring client configuration files
nslcd daemon is not installed, skip configuration
Client uninstall complete.
[test]service nscd status
Redirecting to /bin/systemctl status  nscd.service
nscd.service - Name Service Cache Daemon
   Loaded: loaded (/usr/lib/systemd/system/nscd.service; enabled)
   Active: active (running) since Wed 2013-07-17 02:35:36 EDT; 3s ago
 Main PID: 9362 (nscd)
   CGroup: name=systemd:/system/nscd.service
           ??9362 /usr/sbin/nscd --foreground

Jul 17 02:35:36 client.ipa.baseos.qe systemd[1]: Started Name Service Cache
....
Jul 17 02:35:36 client.ipa.baseos.qe nscd[9362]: 9362 cannot stat() file
`/e...y
Jul 17 02:35:36 client.ipa.baseos.qe nscd[9362]: 9362 Access Vector Cache
(A...d