Sequential API requests in instance list as a bottleneck

[Mateusz Kowalski]

When loading instances list, the following API calls are executed sequentially

* nova server list
* neutron update addresses
* nova flavor list
* glance image list

Only the first one really needs to be the first one, three following ones can be run in parallel. Currently it acts as a big bottleneck in environments with a lot of servers, flavours and images.

[Mateusz Kowalski (makowals)]

For some reason bot did not update the link to review -- https://review.openstack.org/426496/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/426496
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=df194c8b4c25c6128f03a98fd0e628ba14b743ff
Submitter: Jenkins
Branch: master

commit df194c8b4c25c6128f03a98fd0e628ba14b743ff
Author: Mateusz Kowalski <email address hidden>
Date: Sat Jan 28 11:52:06 2017 +0100

    Make API calls in Instances view parallel

    In order to increase rendering speed, make
    api.nova.server_list, api.network.servers_update_addresses,
    api.nova.flavor_list and api.glance.image_list_detailed
    parallel. For admin panel also api.keystone.tenant_list
    is parallelized.

    Closes-bug: #1655307

    Change-Id: I83150d3963f1233edc9efbcdac299520dedbed3c

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ocata
Review: https://review.openstack.org/447111

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/newton
Review: https://review.openstack.org/447130

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 12.0.0.0b1 development milestone.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Mateusz Kowalski (<email address hidden>) on branch: stable/newton
Review: https://review.openstack.org/447130

[OpenStack Infra (hudson-openstack)]

Change abandoned by Mateusz Kowalski (<email address hidden>) on branch: stable/ocata
Review: https://review.openstack.org/447111