[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/requirements.txt b/lib/xos-config/requirements.txt
new file mode 100644
index 0000000..5528415
--- /dev/null
+++ b/lib/xos-config/requirements.txt
@@ -0,0 +1,2 @@
+PyYAML~=3.12
+pykwalify~=1.6.0