Fix wrong flag to prevent failure when selinux perm are correct.

This review[1] has a typo.  The bash flag was incorrect.  It was meant
to be +e/-e to avoid trouble when grep failed.

[1] https://review.openstack.org/#/q/Ib5873383632a1141c8dd3859b34ca29904020790

Change-Id: I39e42ff54fd7a461f7a03cfb8be17db92a35377e
Related-Bug: #1736246

elements/undercloud-install/os-refresh-config/post-configure.d/98-undercloud-setup

@@ -27,9 +27,9 @@ cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys
 
 if [ -e /usr/sbin/getenforce ]; then
     if [ "$(getenforce)" == "Enforcing" ]; then
-        set +x
+        set +e
         selinux_wrong_permission="$(find /root/.ssh/ -exec ls -lZ {} \; | grep -v 'ssh_home_t')"
-        set -x
+        set -e
         if [ -n "${selinux_wrong_permission}" ]; then
             semanage fcontext -a -t ssh_home_t '/root/.ssh(/.*)?'
             restorecon -R /root/.ssh/