Add docs to all the jobs

Change-Id: I621c38a39f637b6843b9754f45fecaf415a22af2
diff --git a/zuul.d/test-jobs.yaml b/zuul.d/test-jobs.yaml
index 4221995..33ca91b 100644
--- a/zuul.d/test-jobs.yaml
+++ b/zuul.d/test-jobs.yaml
@@ -2,24 +2,28 @@
 
 - job:
     name: test-ensure-web-ext
+    description: Test the ensure-web-ext role
     run: playbooks/test-ensure-web-ext.yaml
     files:
       - roles/ensure-web-ext/.*
 
 - job:
     name: test-install-build-essential
+    description: Test the install-build-essential role
     run: playbooks/test-install-build-essential.yaml
     files:
       - roles/install-build-essential/.*
 
 - job:
     name: test-ensure-genmanifest
+    description: Test the ensure-genmanifest role
     run: playbooks/test-ensure-genmanifest.yaml
     files:
       - roles/ensure-genmanifest/.*
 
 - job:
     name: test-ensure-cws-upload
+    description: Test the ensure-cws-upload role
     run: playbooks/test-ensure-cws-upload.yaml
     files:
       - roles/ensure-cws-upload/.*