test: Add a version var for kube branches

This allows us to cache a k8s branch for cri-o 1.0 branch
while allowing overriding of k8s branch in master and other
newer cri-o branches.

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

contrib/test/integration/main.yml

@@ -21,6 +21,8 @@
 
     - name: clone build and install kubernetes
       include: "build/kubernetes.yml"
+      vars:
+        k8s_git_version: "cri-o-node-e2e-patched-logs"
 
     - name: clone build and install runc
       include: "build/runc.yml"
@@ -64,6 +66,7 @@
       include: "build/kubernetes.yml"
       vars:
           force_clone: True
+          k8s_git_version: "cri-o-patched-1.9"
 
     - name: run k8s e2e tests
       include: e2e.yml