quota_remount_test01: SELinux workaround and other fixes

* now it uses tst_kvercmp (to support kernels >= 3)
* some distros doesn't allow creation of quota files in
directories with SELinux file_t type. Now we explicitly
change file type of the test directory to tmp_t

Signed-off-by: Stanislav kholmanskikh <stanislav.kholmanskikh@oracle.com>
Acked-by: Cyril Hrubis <chrubis@suse.cz>
Tested-by: Jan Stancek <jstancek@redhat.com>