Revert "Added subscriber and publisher modules"

This reverts commit 9a5a5b59d6d0701cb1a1cfa5f7ec777d438ec969.
As agreed on #openstack-infra, this change is being made so
proper credit may be given to the actual authors of this patch.

Change-Id: I07fda79ca0bdd2cfd2a1a45d25fd0a1fc692b6f4
Merge "Revert "Added subscriber and publisher modules""