Revert "Temporarily pin to ansible==1.9.4"

ansible-lint was fixed and should work with ansible 2.0

This reverts commit e15930bcc65d07195197d0b11a1d0481ebff7181.

Change-Id: I2f7caa135c44aad7514bd1c325ddab6136519f9a

jenkins/jobs/ansible-role-jobs.yaml

@@ -1,10 +1,9 @@
-# TODO(yolanda): Pin to 1.9.4 since ansible-lint does not support 2.0
 - job-template:
     name: 'gate-{name}-ansible-lint'
     node: '{node}'
 
     builders:
-      - ansible-prep-pinned
+      - ansible-prep
       - ansible-lint-prep
       - revoke-sudo
       - gerrit-git-prep

jenkins/jobs/macros.yaml

@@ -335,14 +335,6 @@
           #!/bin/bash -xe
           sudo -H pip install -U ansible
 
-# TODO (yolanda): Pin to 1.9.4 since ansible-lint does not support 2.0
-- builder:
-    name: ansible-prep-pinned
-    builders:
-      - shell: |
-          #!/bin/bash -xe
-          sudo -H pip install -U ansible==1.9.4
-
 - builder:
     name: ansible-syntax
     builders: