[stable/spinnaker] Relax PSP

Some processes need to change files from different users (deck for
instance).
If the pod is run as non root, deck does not start:

**********************
cp: cannot create regular file 'spinnaker.conf': Permission denied
sed: can't read spinnaker.conf: No such file or directory
sed: can't read spinnaker.conf: No such file or directory
sed: can't read spinnaker.conf: No such file or directory
mv: cannot stat 'spinnaker.conf': No such file or directory
ERROR: Site spinnaker does not exist!
Could not remove /etc/apache2/sites-enabled/000-default.conf: Permission denied
cp: cannot create regular file 'ports.conf': Permission denied
sed: can't read ports.conf: No such file or directory
sed: can't read ports.conf: No such file or directory
mv: cannot stat 'ports.conf': No such file or directory
cp: cannot create regular file 'passphrase': Permission denied
sed: can't read passphrase: No such file or directory
chmod: cannot access 'passphrase': No such file or directory
mv: cannot stat 'passphrase': No such file or directory
cp: cannot create regular file '/opt/deck/html/settings.js': Permission denied
chown: changing ownership of '/var/lock/apache2.ZWzj1uONRl': Operation not permitted
**********************

Relaxing the PSP to allow this.

stable/spinnaker/templates/rbac/psp-halyard.yaml

@@ -17,7 +17,7 @@ spec:
   hostIPC: false
   hostPID: false
   runAsUser:
-    rule: 'MustRunAsNonRoot'
+    rule: 'RunAsAny'
   seLinux:
     rule: 'RunAsAny'
   supplementalGroups: