Update syntax

Jenkinsfile

@@ -43,7 +43,7 @@
         APP_CRED = credentials('uab-dev-openrc')
       }
       steps {
-        bash '''
+        sh '''#!/bin/bash
           echo "hosts: files dns" > /etc/nsswitch.conf
           . ${APP_CRED}
           floatingip=(`openstack floating ip create -c id -c floating_ip_address -f value bright-external-flat-externalnet`)