[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-config/xosconfig/__init__.py b/lib/xos-config/xosconfig/__init__.py
index 9a0b30c..0ae9199 100644
--- a/lib/xos-config/xosconfig/__init__.py
+++ b/lib/xos-config/xosconfig/__init__.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import
 from .config import Config
 
 __all__ = ["Config"]
diff --git a/lib/xos-config/xosconfig/config.py b/lib/xos-config/xosconfig/config.py
index aac6ffb..1fe6707 100644
--- a/lib/xos-config/xosconfig/config.py
+++ b/lib/xos-config/xosconfig/config.py
@@ -13,12 +13,16 @@
 # limitations under the License.
 
 
+from __future__ import absolute_import
+
 import os
 import sys
-import yaml
-import default
-from pykwalify.core import Core as PyKwalify
+
 import pykwalify
+import yaml
+from pykwalify.core import Core as PyKwalify
+
+from . import default
 
 pykwalify.init_logging(1)