Add support for running ansible-test unit in zuul

Depends-On: https://github.com/ansible/ansible-zuul-jobs/pull/538
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

shippable.yml

@@ -8,30 +8,6 @@ matrix:
   exclude:
     - env: T=none
   include:
-    - env: T=units/2.6/1
-    - env: T=units/2.7/1
-    - env: T=units/3.5/1
-    - env: T=units/3.6/1
-    - env: T=units/3.7/1
-    - env: T=units/3.8/1
-    - env: T=units/3.9/1
-
-    - env: T=units/2.6/2
-    - env: T=units/2.7/2
-    - env: T=units/3.5/2
-    - env: T=units/3.6/2
-    - env: T=units/3.7/2
-    - env: T=units/3.8/2
-    - env: T=units/3.9/2
-
-    - env: T=units/2.6/3
-    - env: T=units/2.7/3
-    - env: T=units/3.5/3
-    - env: T=units/3.6/3
-    - env: T=units/3.7/3
-    - env: T=units/3.8/3
-    - env: T=units/3.9/3
-
     - env: T=aix/7.2/1
     - env: T=osx/10.11/1
     - env: T=rhel/7.6/1

test-requirements.txt

@@ -0,0 +1,2 @@
+coverage==4.5.4
+pytest-xdist