Pin kombu and anyjson versions

The minimum version of kombu in the requirements
list has been updated to ensure that compatible
kombu and msgpack libraries are used across all
projects. That update also requires an update
to anyjson.

Addresses bug #1134575

Change-Id: I1520af1315fe649f52ab62769164dc67f4396651
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Merge "Pin kombu and anyjson versions"