Write clouds.yaml to /etc as well

There are more than one user that need to access clouds.yaml values
in tests. Rather than copying the file everywhere, simply output
it to /etc/openstack.

However, we have things copying it at the moment, so output to
both places. A follow up patch will remove the homedir version.

Change-Id: I21d3c2ad7a020a5ab02dc1ab532feae70b718892

functions-common

@@ -76,9 +76,11 @@ function write_clouds_yaml {
     # The location is a variable to allow for easier refactoring later to make it
     # overridable. There is currently no usecase where doing so makes sense, so
     # it's not currently configurable.
-    CLOUDS_YAML=~/.config/openstack/clouds.yaml
+    for clouds_path in /etc/openstack ~/.config/openstack ; do
+        CLOUDS_YAML=$clouds_path/clouds.yaml
 
-    mkdir -p $(dirname $CLOUDS_YAML)
+        sudo mkdir -p $(dirname $CLOUDS_YAML)
+        sudo chown -R $STACK_USER $(dirname $CLOUDS_YAML)
 
         CA_CERT_ARG=''
         if [ -f "$SSL_BUNDLE_FILE" ]; then
@@ -104,6 +106,7 @@ function write_clouds_yaml {
             --os-username admin \
             --os-password $ADMIN_PASSWORD \
             --os-project-name admin
+    done
 }
 
 # trueorfalse <True|False> <VAR>