Add missing test data to sdist tarball.
Fixes
@@ -12,7 +12,8 @@ include README.rst
include LICENSE.txt
include MANIFEST.in
include requirements.txt
-include distributed/tests/mytestegg-1.0.0-py3.4.egg
+include distributed/tests/testegg-1.0.0-py3.4.egg
+include distributed/tests/mytest.pyz
include distributed/tests/*.pem
prune docs/_build
