SPEC: clean up mem and ldb cache files on uninstall

instead of tracking those files as a part of package.

This will allow to get rid of `fchown()` in responder/nss/nsssrv_mmap_cache.c

contrib/sssd.spec.in

@@ -788,9 +788,6 @@ install -D -p -m 0644 contrib/sssd.sysusers %{buildroot}%{_sysusersdir}/sssd.con
 %attr(775,%{sssd_user},%{sssd_user}) %dir %{mcpath}
 %attr(700,root,root) %dir %{secdbpath}
 %attr(751,%{sssd_user},%{sssd_user}) %dir %{deskprofilepath}
-%ghost %attr(0664,%{sssd_user},%{sssd_user}) %verify(not md5 size mtime) %{mcpath}/passwd
-%ghost %attr(0664,%{sssd_user},%{sssd_user}) %verify(not md5 size mtime) %{mcpath}/group
-%ghost %attr(0664,%{sssd_user},%{sssd_user}) %verify(not md5 size mtime) %{mcpath}/initgroups
 %attr(755,%{sssd_user},%{sssd_user}) %dir %{pipepath}
 %attr(750,%{sssd_user},root) %dir %{pipepath}/private
 %attr(755,%{sssd_user},%{sssd_user}) %dir %{pubconfpath}
@@ -1061,6 +1058,13 @@ getent passwd sssd >/dev/null || useradd -r -g sssd -d / -s /sbin/nologin -c "Us
 %systemd_preun sssd-sudo.socket
 
 %postun common
+rm -f %{mcpath}/passwd
+rm -f %{mcpath}/group
+rm -f %{mcpath}/initgroups
+rm -f %{mcpath}/sid
+if [ "$1" = 0 ] ; then
+    rm -f %{dbpath}/*.ldb
+fi
 %systemd_postun_with_restart sssd-autofs.socket
 %systemd_postun_with_restart sssd-nss.socket
 %systemd_postun_with_restart sssd-pac.socket