Merge branch 'issue_1095-rez-test-variant'

Author: ajohns

src/rez/utils/resources.py

@@ -176,6 +176,9 @@ def __repr__(self):
     def __eq__(self, other):
         return (self.key == other.key) and (self.variables == other.variables)
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
     def __hash__(self):
         return hash(self._hashable_repr())