[seaworthy gate] Explicitly configure auth parmaters

Configure Airship Seaworthy site specific parameters
when running tests. This would allow to make required
changes to default values in ./tools/openstack script
which are currently Seaworthy specific.

Change-Id: Ieb1b412436627604fc6597dadfb5d83dd8944355

tools/gate/Jenkinsfile

@@ -286,7 +286,10 @@ def sanity_tests = {
 
         withEnv(['TERM_OPTS=-i',
                  'OSH_EXT_SUBNET=',
-                 'OSH_BR_EX_ADDR=']) {
+                 'OSH_BR_EX_ADDR=',
+                 'OSH_KEYSTONE_URL=https://identity-sw.atlantafoundry.com/v3',
+                 'OSH_REGION_NAME=airship-seaworthy',
+                 'OSH_ADMIN_PASSWD=password123']) {
             sh 'tools/tests.sh'
         }
     }