Various clean up items

- Clean up after xos-migrate tests
- Remove legacy dockerfiles
- Install xos-genx from local copy in Dockerfile.client, as otherwise it
  pulls an older version from pypi as xos-api requires it.

Change-Id: Id613d269c2825e06a83cb50eef7c98125b9cff7a
diff --git a/Makefile b/Makefile
index 08299be..353494f 100644
--- a/Makefile
+++ b/Makefile
@@ -115,6 +115,7 @@
     lib/*/coverage.xml \
     lib/*/*results.xml \
     lib/*/*/VERSION \
+    lib/xos-migrate/xosmigrate/django.log \
     lib/xos-genx/xos-genx-tests/out/* \
     lib/xos-util/tests/test_version.py