Remove plain OpenStack pwd from Heat

Replace plain OpenStack password with its encrypted version

Change-Id: I3afd8c02ce7d004a2817bad69a667edb28982f67
Issue-ID: INT-646
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
diff --git a/test/ete/labs/gwu/onap-openstack-template.env b/test/ete/labs/gwu/onap-openstack-template.env
index 3071356..53139b5 100644
--- a/test/ete/labs/gwu/onap-openstack-template.env
+++ b/test/ete/labs/gwu/onap-openstack-template.env
@@ -46,9 +46,7 @@
 
   openstack_username: ${OS_USERNAME}
 
-  openstack_api_key: ${OS_PASSWORD}
-
-  openstack_auth_method: password
+  openstack_api_key: ${OS_PASSWORD_ENCRYPTED}
 
   openstack_region: RegionOne