[SEBA-450] (part 1)

Refactoring, python3 compat, and tox tests on:

- xosconfig
- xosgenx
- xosutil

Eliminate use of yaml.load() which is unsafe, switch to yaml.safe_load()

More diagnostics during database migration

Change-Id: I0fae5782fca401603a7c4e4ec2b9269ad24bda97
diff --git a/lib/xos-util/xosutil/autodiscover_version.py b/lib/xos-util/xosutil/autodiscover_version.py
index 8f4ea47..2a74273 100644
--- a/lib/xos-util/xosutil/autodiscover_version.py
+++ b/lib/xos-util/xosutil/autodiscover_version.py
@@ -20,6 +20,8 @@
    of the caller.
 """
 
+from __future__ import absolute_import
+
 import inspect
 import os
 
diff --git a/lib/xos-util/xosutil/autoversion_setup.py b/lib/xos-util/xosutil/autoversion_setup.py
index e027d5c..a0f30f0 100644
--- a/lib/xos-util/xosutil/autoversion_setup.py
+++ b/lib/xos-util/xosutil/autoversion_setup.py
@@ -23,14 +23,16 @@
  automatically load the version number from the VERSION file, if one is detected.
 """
 
-import os
-from setuptools import setup
-
-from setuptools.command.sdist import sdist
-from setuptools.command.build_py import build_py
+from __future__ import absolute_import
 
 import inspect
-from autodiscover_version import autodiscover_version
+import os
+
+from setuptools import setup
+from setuptools.command.build_py import build_py
+from setuptools.command.sdist import sdist
+
+from .autodiscover_version import autodiscover_version
 
 
 class SdistCommand(sdist):