Correct SB project groups data type

A handful of recent project additions included a "groups" key which
used a string instead of a list, and manage-projects dutifully
iterated over each element of these strings creating new
single-character project groups corresponding to them. Correct the
offending entries to be a list instead.

Manual cleanup will be required in StoryBoard's database once this
change merges.

Change-Id: Icbef648e9948e0fa636dd0d15039b6fc229541ca

gerrit/projects.yaml

@@ -98,17 +98,20 @@
   description: inaugust.com website
   use-storyboard: true
   acl-config: /home/gerrit2/acls/inaugust/inaugust.config
-  groups: inaugust
+  groups:
+    - inaugust
 - project: inaugust/src.sh
   description: Clone and switch between git repos
   use-storyboard: true
   acl-config: /home/gerrit2/acls/inaugust/inaugust.config
-  groups: inaugust
+  groups:
+    - inaugust
 - project: inaugust/ttrun
   description: A simple tool for running testtools tests
   use-storyboard: true
   acl-config: /home/gerrit2/acls/inaugust/inaugust.config
-  groups: inaugust
+  groups:
+    - inaugust
 - project: jjb/jenkins-job-builder
   use-storyboard: true
   groups:
@@ -7736,7 +7739,8 @@
     to use OpenTSDB as a backend)
 - project: x/python-picassoclient
   description: Python client for Picasso API
-  groups: picasso
+  groups:
+    - picasso
   acl-config: /home/gerrit2/acls/x/picasso.config
 - project: x/python-rackclient
   description: RETIRED, Client library for RACK API