Use os_client config for Openstack requests

we need to use os_client config and direct api calls
because it is very stable.
Closes-Issue: PROD-20033

Change-Id: I3645f0426030bbbfa63b7bbc75a41f8d0df86dba
diff --git a/_modules/cinderv3/volume.py b/_modules/cinderv3/volume.py
new file mode 100644
index 0000000..deaaf6d
--- /dev/null
+++ b/_modules/cinderv3/volume.py
@@ -0,0 +1,95 @@
+from __future__ import absolute_import
+
+import common
+
+try:
+    from urllib.parse import urlencode
+except ImportError:
+    from urllib import urlencode
+
+
+@common.send("get")
+def volume_list(**kwargs):
+    """
+    Return list of cinder volumes.
+    """
+    url = '/volumes?{}'.format(urlencode(kwargs))
+    return url, {}
+
+
+@common.send("get")
+def volume_type_list(**kwargs):
+    """
+    Return list of volume types
+    """
+    url = '/types?{}'.format(urlencode(kwargs))
+    return url, {}
+
+
+@common.get_by_name_or_uuid(volume_type_list, 'volume_types')
+@common.send("get")
+def volume_type_get(volume_type_id, **kwargs):
+    """
+    Returns id of the specified volume type name
+    """
+    url = "/types/{volume_type_id}".format(volume_type_id=volume_type_id)
+    return url, {}
+
+
+@common.get_by_name_or_uuid(volume_type_list, 'volume_types')
+@common.send("delete")
+def volume_type_delete(volume_type_id, **kwargs):
+    """
+    delete the specified volume type
+    """
+    url = "/types/{volume_type_id}".format(volume_type_id=volume_type_id)
+    return url, {}
+
+
+@common.send("post")
+def volume_type_create(name, **kwargs):
+    """
+    Create cinder volume type
+    """
+    url = "/types"
+    req = {"volume_type": {"name": name}}
+    return url, {'json': req}
+
+
+@common.get_by_name_or_uuid(volume_type_list, 'volume_types')
+@common.send("get")
+def keys_volume_type_get(volume_type_id, **kwargs):
+    """
+    Return extra specs of the specified volume type.
+    """
+    url = "/types/{volume_type_id}/extra_specs".format(
+        volume_type_id=volume_type_id)
+    return url, {}
+
+
+@common.send("put")
+def _key_volume_type_set(type_id, key, value, **kwargs):
+    url = "/types/{volume_type_id}/extra_specs/{key}".format(
+        volume_type_id=type_id, key=key)
+    return url, {'json': {str(key): str(value)}}
+
+
+@common.get_by_name_or_uuid(volume_type_list, 'volume_types')
+def keys_volume_type_set(volume_type_id, keys=None, **kwargs):
+    """
+    Set extra specs of the specified volume type.
+    """
+    if keys is None:
+        keys = {}
+    cloud_name = kwargs["cloud_name"]
+    cur_keys = keys_volume_type_get(
+        volume_type_id, cloud_name=cloud_name)["body"]["extra_specs"]
+
+    for k, v in keys.items():
+        if (k, v) in cur_keys.items():
+            continue
+        resp = _key_volume_type_set(volume_type_id, k, v, cloud_name=cloud_name)
+        if resp.get("result") is False:
+            return resp
+
+    return {"result": True}