[SEBA-450] (part 2)

Add tox testing support on additional XOS library modules:

- xos-api
- xos-kafka (has no tests)
- xos-migrate (has no tests)
- xos-synchronizer

Change-Id: I98195bc9747971d3515882d517affe058dd86ac5
diff --git a/lib/xos-migrate/.gitignore b/lib/xos-migrate/.gitignore
index ed8b98a..81c7233 100644
--- a/lib/xos-migrate/.gitignore
+++ b/lib/xos-migrate/.gitignore
@@ -1,6 +1,2 @@
-build
-dist
-XosMigrate.egg-info
-.coverage
-coverage.xml
-cover
+# setup.py copies this, don't commit it
+xosmigrate/VERSION