Skip broken ansible-lint

See [1].

[1] https://github.com/ansible/ansible-lint/issues/969

Change-Id: I849d9b09e973316308e574c447a78868e93a5420

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-ansible-lint>=3.0.0 # MIT
+ansible-lint>=3.0.0,!=4.3.0 # MIT
 bashate>=0.2 # Apache-2.0
 coverage>=4.0 # Apache-2.0
 doc8 # Apache-2.0