Add tenant to url formatting.

Expose the tenant name to the executor and url formatter so that we can
store logs per tenant.

Change-Id: Ifad1ba668ee5b86e6c6f5cb71eae53ad8d49f3ff
Signed-off-by: Jamie Lennox <jamielennox@gmail.com>
diff --git a/tests/fixtures/layouts/reporting-github.yaml b/tests/fixtures/layouts/reporting-github.yaml
index 8dd35b0..43e71c7 100644
--- a/tests/fixtures/layouts/reporting-github.yaml
+++ b/tests/fixtures/layouts/reporting-github.yaml
@@ -29,7 +29,7 @@
       github:
         comment: false
         status: 'success'
-        status-url: http://logs.example.com/{pipeline.name}/{change.project}/{change.number}/{change.patchset}/
+        status-url: http://logs.example.com/{tenant.name}/{pipeline.name}/{change.project}/{change.number}/{change.patchset}/
     failure:
       github:
         comment: false