Replicate apply method in the DynamicClient (#45)

* * Replicate apply method in the DynamicClient

Signed-off-by: Alina Buzachis <abuzachis@redhat.com>

* * Add changelog fragment

Signed-off-by: Alina Buzachis <abuzachis@redhat.com>

plugins/module_utils/k8sdynamicclient.py

@@ -0,0 +1,39 @@
+# Copyright [2017] [Red Hat, Inc.]
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+from kubernetes.dynamic import DynamicClient
+
+from ansible_collections.kubernetes.core.plugins.module_utils.apply import apply
+from ansible_collections.kubernetes.core.plugins.module_utils.exceptions import ApplyException
+
+
+class K8SDynamicClient(DynamicClient):
+    def apply(self, resource, body=None, name=None, namespace=None):
+        body = super().serialize_body(body)
+        body['metadata'] = body.get('metadata', dict())
+        name = name or body['metadata'].get('name')
+        if not name:
+            raise ValueError("name is required to apply {0}.{1}".format(resource.group_version, resource.kind))
+        if resource.namespaced:
+            body['metadata']['namespace'] = super().ensure_namespace(resource, namespace, body)
+        try:
+            return apply(resource, body)
+        except ApplyException as e:
+            raise ValueError("Could not apply strategic merge to %s/%s: %s" %
+                             (body['kind'], body['metadata']['name'], e))