bitbake: toaster: Replace references to LayerSource models

Replace references to the now deprecated layersource models across
Toaster with the new enums for layer source types.

(Bitbake rev: 48c09c62eb979d840132e58144f0d81ffee675b1)

Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/orm/models.py

@@ -1287,6 +1287,14 @@ class LayerSource(object):
         (TYPE_BUILD, "build"),
     )
 
+    def types_dict():
+        """ Turn the TYPES enums into a simple dictionary """
+        dictionary = {}
+        for key in LayerSource.__dict__:
+            if "TYPE" in key:
+                dictionary[key] = getattr(LayerSource, key)
+        return dictionary
+
 
 class Layer(models.Model):