Fix regex in NoRoaming workaround

The * needs escaping. Otherwise all lines starting with Host would
match, resulting in puppet apply error:

Error: 5 lines match pattern '^Host *' in file '/etc/ssh/sshd_config'.  One or no line must match the pattern.

Change-Id: I4f2d3c82294c8de1439e84c0e2d1c6b5c19bc0d2

modules/openstack_project/manifests/template.pp

@@ -272,7 +272,7 @@ class openstack_project::template (
   }
 
   file_line { 'ensure NoRoaming for ssh clients':
-    after => '^Host *',
+    after => '^Host \*',
     path  => '/etc/ssh/ssh_config',
     line  => '    UseRoaming no',
   }