Refactoring of k8s manager and tests

Changes:
 - Official kubernetes python lib
 - Rewrite k8s api wrapper in OOP manner
 - Use api where its possible instead of cli
 - Remove virtlet code because its can be replaced with pod api
 - Remove unused/oudated manager code
 - Remove bug workaround in k8s upgrade template
 - Remove netchecker obsolete code
 - Remove unfinished test_rbd_flexvolume_driver

Change-Id: I446a240123282196a6ba54f588aea84791f175ba
Related-PROD: PROD-21700
diff --git a/tcp_tests/managers/k8s/pods.py b/tcp_tests/managers/k8s/pods.py
index 94abc20..98192a6 100644
--- a/tcp_tests/managers/k8s/pods.py
+++ b/tcp_tests/managers/k8s/pods.py
@@ -11,6 +11,9 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 
+
+from kubernetes import client
+
 from devops.helpers import helpers
 
 from tcp_tests.managers.k8s.base import K8sBaseResource
@@ -18,91 +21,51 @@
 
 
 class K8sPod(K8sBaseResource):
-    """docstring for K8sPod"""
+    resource_type = 'pod'
 
-    def __repr__(self):
-        return "<K8sPod: %s>" % self.name
+    def _read(self, **kwargs):
+        return self._manager.api.read_namespaced_pod(
+            self.name, self.namespace, **kwargs)
 
-    @property
-    def name(self):
-        return self.metadata.name
+    def _create(self, body, **kwargs):
+        return self._manager.api.create_namespaced_pod(
+            self.namespace, body, **kwargs)
 
-    @property
-    def phase(self):
-        return self.status.phase
+    def _patch(self, body, **kwargs):
+        return self._manager.api.patch_namespaced_pod(
+            self.name, self.namespace, body, **kwargs)
 
-    @property
-    def namespace(self):
-        return self.metadata.namespace
+    def _replace(self, body, **kwargs):
+        return self._manager.api.replace_namespaced_pod(
+            self.name, self.namespace, body, **kwargs)
 
-    def wait_phase(self, phase, timeout=60, interval=5):
-        """Wait phase of pod_name from namespace while timeout
+    def _delete(self, **kwargs):
+        self._manager.api.delete_namespaced_pod(
+            self.name, self.namespace, client.V1DeleteOptions(), **kwargs)
 
-        :param list or str: phase
-        :param int: timeout
+    def wait_phase(self, phases, timeout=60, interval=3):
+        if isinstance(phases, str):
+            phases = [phases]
 
-        :rtype: None
-        """
-        if isinstance(phase, str):
-            phase = [phase]
+        helpers.wait(lambda: self.read().status.phase in phases,
+                     timeout=timeout, interval=interval,
+                     timeout_msg='Timeout waiting, pod {0} phase is not in '
+                                 '"{1}"'.format(self.name, phases))
+        return self
 
-        def check():
-            self._add_details(self._manager.get(name=self.name,
-                                                namespace=self.namespace))
-            return self.phase in phase
-
-        helpers.wait(check, timeout=timeout, interval=interval,
-                     timeout_msg='Timeout waiting({timeout}s), pod {pod_name} '
-                                 'is not in "{phase}" phase'.format(
-                                     timeout=timeout,
-                                     pod_name=self.name,
-                                     phase=phase))
-
-    def wait_running(self, timeout=60, interval=5):
-        self.wait_phase(['Running'], timeout=timeout, interval=interval)
+    def wait_running(self, timeout=240, interval=3):
+        return self.wait_phase('Running', timeout=timeout, interval=interval)
 
 
 class K8sPodManager(K8sBaseManager):
-    """docstring for ClassName"""
-
     resource_class = K8sPod
 
-    def _get(self, name, namespace=None, **kwargs):
-        namespace = namespace or self.namespace
-        return self.api.read_namespaced_pod(
-            name=name, namespace=namespace, **kwargs)
+    @property
+    def api(self):
+        return self._cluster.api_core
 
-    def _list(self, namespace=None, **kwargs):
-        namespace = namespace or self.namespace
-        return self.api.list_namespaced_pod(namespace=namespace, **kwargs)
+    def _list(self, namespace, **kwargs):
+        return self.api.list_namespaced_pod(namespace, **kwargs)
 
-    def _create(self, body, namespace=None, **kwargs):
-        namespace = namespace or self.namespace
-        return self.api.create_namespaced_pod(
-            body=body, namespace=namespace, **kwargs)
-
-    def _replace(self, body, name, namespace=None, **kwargs):
-        namespace = namespace or self.namespace
-        return self.api.replace_namespaced_pod(
-            body=body, name=name, namespace=namespace, **kwargs)
-
-    def _delete(self, body, name, namespace=None, **kwargs):
-        namespace = namespace or self.namespace
-        # NOTE: the following two lines should be deleted after
-        # serialization is fixed in python-k8sclient
-        if isinstance(body, self.resource_class):
-            body = body.swagger_types
-        return self.api.delete_namespaced_pod(
-            body=body, name=name, namespace=namespace, **kwargs)
-
-    def _deletecollection(self, namespace=None, **kwargs):
-        namespace = namespace or self.namespace
-        return self.api.deletecollection_namespaced_pod(
-            namespace=namespace, **kwargs)
-
-    def full_list(self, *args, **kwargs):
-        lst = self._full_list(*args, **kwargs)
-        return [self.resource_class(self, item) for item in lst.items]
-
-    def _full_list(self, **kwargs):
-        return self.api.list_pod(**kwargs)
+    def _list_all(self, **kwargs):
+        return self.api.list_pod_for_all_namespaces(**kwargs)