We have identified an issue with stevedore < 3.3.0 where the
cloud-launcher, running under ansible, makes stevedore hashe a /tmp
path into a entry-point cache file it makes, causing a never-ending
expansion.
This appears to be fixed by [1] which is available in 3.3.0. Ensure
we install this on bridge. For good measure, add a ".disable" file as
we don't really need caches here.
There's currently 491,089 leaked files, so I didn't think it wise to
delete these in a ansible loop as it will probably time out the job.
We can do this manually once we stop creating them :)
[1] d7cfadbb7d
Change-Id: If5773613f953f64941a1d8cc779e893e0b2dd516
a12d2fce2b