Git origin can't have a trailing slash

Change-Id: Ic1197f1ee34661709f31e263f23bdc8701838c60
diff --git a/tests/etc/jjb-config.yaml b/tests/etc/jjb-config.yaml
index ce96702..542c12e 100644
--- a/tests/etc/jjb-config.yaml
+++ b/tests/etc/jjb-config.yaml
@@ -1,6 +1,6 @@
 zuul_server:
   gerrit_site: http://review.openstack.org
-  git_origin: git://git.openstack.org/
+  git_origin: git://git.openstack.org
   gearman_host: localhost
   gearman_port: 0