Fix deprecated params user_id, role_id, tenant_id

Update keystone cli by changing parameter options (user_id, role_id and tenant_id)
to use '-' rather than '_' in the method user_role_add and consequently the method
user_role_remove without maintain backward compatibility because these are deprecated.

python-keystoneclient - Bug #1150434
Change-Id: Ia5113718eb050cf7dba443b8d0caf3bdaa1730f0
diff --git a/lib/neutron b/lib/neutron
index 01fe3ea..f6c2377 100644
--- a/lib/neutron
+++ b/lib/neutron
@@ -301,9 +301,9 @@
             --email=neutron@example.com \
             | grep " id " | get_field 2)
         keystone user-role-add \
-            --tenant_id $SERVICE_TENANT \
-            --user_id $NEUTRON_USER \
-            --role_id $ADMIN_ROLE
+            --tenant-id $SERVICE_TENANT \
+            --user-id $NEUTRON_USER \
+            --role-id $ADMIN_ROLE
         if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
             NEUTRON_SERVICE=$(keystone service-create \
                 --name=neutron \