Allow putting service users in a seperate domain

Make it possible to construct the service users in their own seperate
domain. Changing this away from Default will not work for everyone yet,
though it does work for basic service interaction however enabling it
will allow us to start testing and hopefully gating that services aren't
relying on v2 only concepts.

Change-Id: I7e73df5dd1caabf355783da2bc0f3007ade92fba
diff --git a/functions-common b/functions-common
index 0806681..71dda76 100644
--- a/functions-common
+++ b/functions-common
@@ -840,27 +840,49 @@
     echo $role_id
 }
 
+# Returns the domain parts of a function call if present
+# Usage: _get_domain_args [<user_domain> <project_domain>]
+function _get_domain_args {
+    local domain
+    domain=""
+
+    if [[ -n "$1" ]]; then
+        domain="$domain --user-domain $1"
+    fi
+    if [[ -n "$2" ]]; then
+        domain="$domain --project-domain $2"
+    fi
+
+    echo $domain
+}
+
 # Gets or adds user role to project
-# Usage: get_or_add_user_project_role <role> <user> <project>
+# Usage: get_or_add_user_project_role <role> <user> <project> [<user_domain> <project_domain>]
 function get_or_add_user_project_role {
     local user_role_id
+
+    domain_args=$(_get_domain_args $4 $5)
+
     # Gets user role id
     user_role_id=$(openstack role list \
         --user $2 \
         --column "ID" \
         --project $3 \
         --column "Name" \
+        $domain_args \
         | grep " $1 " | get_field 1)
     if [[ -z "$user_role_id" ]]; then
         # Adds role to user and get it
         openstack role add $1 \
             --user $2 \
-            --project $3
+            --project $3 \
+            $domain_args
         user_role_id=$(openstack role list \
             --user $2 \
             --column "ID" \
             --project $3 \
             --column "Name" \
+            $domain_args \
             | grep " $1 " | get_field 1)
     fi
     echo $user_role_id