Add a message about kubernetes version not being supported

Return an error if validation is attempted against a very
old/very new version of kubernetes

This is an error to force the user to either upgrade/downgrade
their version of kubernetes-validate or turn off validation

openshift/dynamic/client.py

@@ -292,6 +292,8 @@ def validate(self, definition, version=None, strict=False):
             kubernetes_validate.validate(definition, version, strict)
         except kubernetes_validate.utils.ValidationError as e:
             errors.append("resource definition validation error at %s: %s" % ('.'.join([str(item) for item in e.path]), e.message))  # noqa: B306
+        except kubernetes_validate.utils.VersionNotSupportedError as e:
+            errors.append("Kubernetes version %s is not supported by kubernetes-validate" % version)
         except kubernetes_validate.utils.SchemaNotFoundError as e:
             warnings.append("Could not find schema for object kind %s with API version %s in Kubernetes version %s (possibly Custom Resource?)" %
                             (e.kind, e.api_version, e.version))