Blank is missing in error message when "segmentation_id" is not specified in l2gw and l2gwcon creation.

[Kengo Hobo]

Blank is missing in error message when "segmentation_id" is not specified in l2gw and l2gwcon creation.

The outputted error message is following.
ubuntu@instance0318:~$ curl -i -X POST -H "X-Auth-Token: $TOKEN" http://172.16.1.21:9696/v2.0/l2-gateway-connections -d '{"l2_gateway_connection":{"l2_gateway_id":"e751061a-6253-4551-ae07-5ce6fdd7aea7", "network_id":"e2c8e74e-b0dc-4ef8-b07c-f433100516b3"}}'
HTTP/1.1 400 Bad Request
Content-Type: application/json
Content-Length: 165
X-Openstack-Request-Id: req-1aa7ad44-9322-46fe-89c3-a61656cabae6
Date: Tue, 05 Apr 2016 05:16:11 GMT

{"NeutronError": {"message": "Invalid input for operation: Segmentation id must be specified in createl2gateway connections.", "type": "InvalidInput", "detail": ""}}

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/301448

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/301448
Committed: https://git.openstack.org/cgit/openstack/networking-l2gw/commit/?id=799942dc316fd56685e0fd960e9b1bd365b0e309
Submitter: Jenkins
Branch: master

commit 799942dc316fd56685e0fd960e9b1bd365b0e309
Author: HoboK <email address hidden>
Date: Tue Apr 5 05:39:33 2016 +0000

    Add blank to message when creating resource without "seg_id"

    Change-Id: I267dcf4b411d4b68bb47dc8cc74594ced88759cc
    Closes-Bug: #1566151