bitbake: toaster: test 'commit' first in get_vcs_reference

The 'commit' value should be tested and used first when resolving the ref
for a layer, since that is an explicit override in each layer index
'layeritem' record. If should take precedence over more-global 'branch'
and 'release' values, instead of being last.

[YOCTO #11515]

(Bitbake rev: b303365ca3a1ba5fb8c6839180f1ec26df60c6ce)

Signed-off-by: David Reyna <David.Reyna@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/orm/models.py

@@ -1516,12 +1516,12 @@ class Layer_Version(models.Model):
         return self._handle_url_path(self.layer.vcs_web_tree_base_url, '')
 
     def get_vcs_reference(self):
+        if self.commit is not None and len(self.commit) > 0:
+            return self.commit
         if self.branch is not None and len(self.branch) > 0:
             return self.branch
         if self.release is not None:
             return self.release.name
-        if self.commit is not None and len(self.commit) > 0:
-            return self.commit
         return 'N/A'
 
     def get_detailspage_url(self, project_id=None):