Hyperlink task footers

Add a commentlink entry which matches task footers in commit
messages and links them to the corresponding task URL on storyboard.
This has already been tested on review-dev, and seems to work
without breaking the separate its-storyboard entry which handles
task updating automation.

Change-Id: I8e69fa7e5dfdef5ea9c05fa457c4ee08c624d005

modules/openstack_project/manifests/review.pp

@@ -155,6 +155,11 @@ class openstack_project::review (
           match => '\\\\b[Ss]tory:? #?(\\\\d+)',
           link  => 'https://storyboard.openstack.org/#!/story/$1',
         },
+        {
+          name  => 'task',
+          match => '\\\\b[Tt]ask:? #?(\\\\d+)',
+          link  => 'https://storyboard.openstack.org/#!/task/$1',
+        },
         {
           name  => 'its-storyboard',
           match => '\\\\b[Tt]ask:? #?(\\\\d+)',