Add branch-network checker and zuul project

Change-Id: Iebf4d280e5792663d1a2e11f25a9881e72307e9e
diff --git a/checkers.yaml b/checkers.yaml
index 5a29acb..f424911 100644
--- a/checkers.yaml
+++ b/checkers.yaml
@@ -111,6 +111,11 @@
     name: "Zuul Check Pipeline"
     description: "Run Zuul jobs on new patchsets"
 
+  - uuid: "zuul-check:plugins_branch-network"
+    repository: "plugins/branch-network"
+    name: "Zuul Check Pipeline"
+    description: "Run Zuul jobs on new patchsets"
+
   - uuid: "zuul-check:plugins_changemessage"
     repository: "plugins/changemessage"
     name: "Zuul Check Pipeline"
diff --git a/zuul/main.yaml b/zuul/main.yaml
index 5de7841..df80497 100644
--- a/zuul/main.yaml
+++ b/zuul/main.yaml
@@ -34,6 +34,7 @@
           - plugins/autosubmitter
           - plugins/avatars-external
           - plugins/batch
+          - plugins/branch-network
           - plugins/changemessage
           - plugins/checks
           - plugins/code-owners