Fix build description when saving to Glance

Change-Id: Id285d963d04be7836827ef953ec368c7e585e019
diff --git a/packer-image-buid.groovy b/packer-image-buid.groovy
index 3da11fd..d608188 100644
--- a/packer-image-buid.groovy
+++ b/packer-image-buid.groovy
@@ -297,7 +297,7 @@
                                 openstack.runOpenstackCommand(_cmdline, rcFile, openstackEnv)
                             }
                         }
-                        currentBuild.description = "${imageName}.qcow2 uploaded tenant: ${job_env['OS_PROJECT_NAME']}"
+                        currentBuild.description = "${imageName}.qcow2 uploaded tenant: ${os_openrc['OS_PROJECT_NAME']}"
                         published = true
                     }
                     if ('http' in publishBackends) {