Add metrics-reporter-cloudwatch plugin to the checks pipeline

Depends-On: https://gerrit-review.googlesource.com/275193
Change-Id: I107f3f41eaf3b633782216f76ef909c0bbeb8f86

zuul.d/projects.yaml

diff --git a/zuul.d/projects.yaml b/zuul.d/projects.yaml
index 72aef60..556c2ce 100644
--- a/zuul.d/projects.yaml
+++ b/zuul.d/projects.yaml
@@ -201,6 +201,12 @@
         - gerrit-plugin-build
 
 - project:
+    name: plugins/metrics-reporter-cloudwatch
+    check:
+      jobs:
+        - gerrit-plugin-build
+
+- project:
     name: plugins/metrics-reporter-jmx
     check:
       jobs: