[SEBA-412] Automated reformat of Python code

Passes of modernize, autopep8, black, then check with flake8

flake8 + manual fixes:
  lib/xos-config
  lib/xos-kafka
  lib/xos-util
  xos/coreapi
  xos/api
  xos/xos_client

Change-Id: Ib23cf84cb13beb3c6381fa0d79594dc9131dc815
diff --git a/lib/xos-util/xosutil/version.py b/lib/xos-util/xosutil/version.py
index 57833b8..8456fc5 100644
--- a/lib/xos-util/xosutil/version.py
+++ b/lib/xos-util/xosutil/version.py
@@ -13,4 +13,4 @@
 # limitations under the License.
 
 # This file is autogenerated. Do not edit.
-__version__ = 'unknown'
+__version__ = "unknown"