fixed test to use hostvars and not expect vars sub

vars is at the same level as hostvars and was only included in hostvars
temporarily as a bug

test/integration/roles/test_filters/tasks/main.yml

@@ -77,4 +77,4 @@
         - "31 == ['x','y']|map('extract',{'x':42,'y':31})|list|last"
         - "'local' == ['localhost']|map('extract',hostvars,'ansible_connection')|list|first"
         - "'local' == ['localhost']|map('extract',hostvars,['ansible_connection'])|list|first"
-        - "'amazon' == ['localhost']|map('extract',hostvars,['vars','group_names',0])|list|first"
+        - "'amazon' == ['localhost']|map('extract',hostvars,['group_names',0])|list|first"