Fix CRDs

Use v1beta1 for the first example (it's a bit simpler) and v1 for the second example.
The second example illustrate the served and storage attributes, and the fact that
each version can have a different schema.

Closes #541

k8s/coffee-1.yaml

@@ -1,4 +1,4 @@
-apiVersion: apiextensions.k8s.io/v1alpha1
+apiVersion: apiextensions.k8s.io/v1beta1
 kind: CustomResourceDefinition
 metadata:
   name: coffees.container.training

k8s/coffee-2.yaml

@@ -1,10 +1,9 @@
-apiVersion: apiextensions.k8s.io/v1alpha1
+apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   name: coffees.container.training
 spec:
   group: container.training
-  version: v1alpha1
   scope: Namespaced
   names:
     plural: coffees
@@ -12,21 +11,25 @@ spec:
     kind: Coffee
     shortNames:
     - cof
-  additionalPrinterColumns:
-  - JSONPath: .spec.taste
-    description: Subjective taste of that kind of coffee bean
-    name: Taste
-    type: string
-  - JSONPath: .metadata.creationTimestamp
-    name: Age
-    type: date
-  validation:
-    openAPIV3Schema:
-      properties:
-        spec:
-          required:
-          - taste
-          properties:
-            taste:
-              description: Subjective taste of that kind of coffee bean
-              type: string
+  versions:
+  - name: v1alpha1
+    served: true
+    storage: true
+    schema:
+      openAPIV3Schema:
+        properties:
+          spec:
+            required:
+            - taste
+            properties:
+              taste:
+                description: Subjective taste of that kind of coffee bean
+                type: string
+    additionalPrinterColumns:
+    - jsonPath: .spec.taste
+      description: Subjective taste of that kind of coffee bean
+      name: Taste
+      type: string
+    - jsonPath: .metadata.creationTimestamp
+      name: Age
+      type: date