ci: use major Kubernetes versions again

With the update to minikube v1.14.1 downloading binaries for the recent
Kubernetes patch releases works again. Enable detecttion of the latest
patch releases for use in the CI jobs.

Fixes: #1588
Signed-off-by: Niels de Vos <ndevos@redhat.com>

jobs/k8s-e2e-external-storage.yaml

@@ -12,7 +12,7 @@
     parameters:
       - string:
           name: k8s_version
-          default: '1.19.2'
+          default: '1.19'
           description: Kubernetes version to deploy in the test cluster.
     pipeline-scm:
       scm:

jobs/mini-e2e.yaml

@@ -2,8 +2,8 @@
 - project:
     name: mini-e2e
     k8s_version:
-      - '1.18.9'
+      - '1.18'
-      - '1.19.2'
+      - '1.19'
     jobs:
       - 'mini-e2e_k8s-{k8s_version}'
       - 'mini-e2e-helm_k8s-{k8s_version}'

jobs/upgrade-tests.yaml

@@ -1,7 +1,7 @@
 ---
 - project:
     name: upgrade-tests
-    k8s_version: '1.18.9'
+    k8s_version: '1.18'
     test_type:
       - 'cephfs'
       - 'rbd'