The message executor should work with "eventlet"

[Jean-Emile DARTOIS]

By default, the messaging executor is 'blocking' and it doesn't work with eventlet.
We need to fix that.

Solution
--------

In watcher/common/messaging/messaging_handler.py, modify the build_server() method of MessagingHandler as followed:

    def build_server(self, target):
        return om.get_rpc_server(self.__transport, target,
                                 self.__endpoints,
                                 executor='eventlet',
                                 serializer=self.__serializer)

[Jean-Emile DARTOIS (jed56)]

change status

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/338356

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/338356
Committed: https://git.openstack.org/cgit/openstack/watcher/commit/?id=21d161007120ccebbc4b7cf3f4a9973aeb883e58
Submitter: Jenkins
Branch: master

commit 21d161007120ccebbc4b7cf3f4a9973aeb883e58
Author: David TARDIVEL <email address hidden>
Date: Wed Jul 6 17:38:54 2016 +0200

    Update executor to eventlet

    Default 'blocking' executor handles only one message at once.
    'eventlet' executor is recommended.

    Change-Id: Id738d0462fbb3c7fd6c78ee2f0dd0f1e79131ca7
    Closes-Bug: #1517843

[Thierry Carrez (ttx)]

This issue was fixed in the openstack/watcher 0.29.0 release.