A Request-Too-Long error can be raised in case of too many aggregates
are attached to a host. The fix is to split the requests.
The request is executed by host via a periodic task. Result is set in
cache so no performances impact is expected.
The change introduce a new compute configuration option
`compute.sharing_providers_max_uuids_per_request = 200`.
Closes-bug: #2068893
Change-Id: I1355c0813cb99067ead60f9835938566289beb20
Signed-off-by: Sahid Orentino Ferdjaoui <sahid.ferdjaoui@industrialdiscipline.com>
f254729a56