Import infra-ansible job

Import the infra-ansible job, convert it to Zuul v3 native and rename
for our naming conventions.

Change-Id: I5669fd546e4c1ae33133ce7a45e7615a67983532

.zuul.yaml

@@ -0,0 +1,13 @@
+- job:
+    name: infra-ansible-tox-ansible-syntax-check
+    parent: tox
+    vars:
+      tox_envlist: ansible-syntax-check
+
+- project:
+    check:
+      jobs:
+        - infra-ansible-tox-ansible-syntax-check
+    gate:
+      jobs:
+        - infra-ansible-tox-ansible-syntax-check