Use new infra pipelines

As part of Zuul v2 partial rollback, use the temporary pipelines.

Change-Id: Ieccc082c82f17c8a555c0112c45918a02056e205
Depends-On: I084b819ea0a4b67f36df61ccb3bfd6963cc3940d
diff --git a/.zuul.yaml b/.zuul.yaml
index 9f0382b..5db775a 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -1,13 +1,13 @@
 - project:
     name: openstack-infra/zuul
-    check:
+    infra-check:
       jobs:
         - tox-docs
         - tox-cover:
             voting: false
         - tox-pep8
         - tox-py27
-    gate:
+    infra-gate:
       jobs:
         - tox-docs
         - tox-pep8