Fix mad-dog to GCP invalid name errors (#3072)

* Always lowercase branch names

* Clean fields for GCP VM name

* Dont really need sha

* Bugfix

* Since instances are deleted, not worth namespacing them

.circleci/config.yml

@@ -118,7 +118,8 @@ jobs:
             echo $GCLOUD_SERVICE_KEY | gcloud auth activate-service-account $GCLOUD_SERVICE_ACCOUNT_EMAIL --key-file=-
             gcloud --quiet config set project ${GOOGLE_PROJECT_ID}
             gcloud --quiet config set compute/zone ${GOOGLE_COMPUTE_ZONE}
-            GCLOUD_VM_NAME=mad-dog-test-$CIRCLE_BRANCH-$GIT_SHA-$(date +%s)
+
+            GCLOUD_VM_NAME=mad-dog-test-$(date +%s)
             echo "GCLOUD_VM_NAME" $GCLOUD_VM_NAME
 
             export PROTOCOL_DIR=/home/circleci/project