travis: Skip development database setup in production tests.

This saves about 20s on the runtime of the production build.

provision.py

@@ -191,6 +191,8 @@ def main():
         run(["sudo", "pg_createcluster", "-e", "utf8", "--start", POSTGRES_VERSION, "main"])
         run(["sudo", "service", "redis-server", "restart"])
         run(["sudo", "service", "memcached", "restart"])
+    if '--production-travis' not in sys.argv:
+        # These won't be used anyway
         run(["scripts/setup/configure-rabbitmq"])
         run(["tools/setup/postgres-init-dev-db"])
         run(["tools/do-destroy-rebuild-database"])

tools/travis/setup-production

@@ -7,7 +7,7 @@ set -x
 # to conflicts over which version of postgres should be running.
 sudo apt-get remove postgresql-9.1 postgresql-9.2 postgresql-9.4 -y
 
-python provision.py --travis
+python provision.py --travis --production-travis
 cp -a tools/travis/success-http-headers.txt ~/
 source /srv/zulip-venv/bin/activate
 ./tools/build-release-tarball travis