cobblerd: don't search user's ~/.local on Fedora and RHEL-6

This fix is to avoid the following SELinux denial on RHEL-6 and
Fedora 20 (and further):

avc:  denied  { search } for  pid=1558 comm="cobblerd" name=".local"
dev=dm-0 ino=82028 scontext=system_u:system_r:cobblerd_t:s0
tcontext=system_u:object_r:gconf_home_t:s0 tclass=dir
Automatic commit of package [cobbler20] minor release [2.0.11-24].