Fix variable name

There is no 'role' variable, and given the test and code after, that's
likely a test on 'ds'

v2/ansible/playbook/role/requirement.py

@@ -92,7 +92,7 @@ class RoleRequirement(RoleDefinition):
                 ds["scm"] = scm
                 ds["src"] = src
 
-            if 'name' in role:
+            if 'name' in ds:
                 ds["role"] = ds["name"]
                 del ds["name"]
             else: