invalid gre/vxlan id shouldn't be created successfully for ml2

[Xurong Yang]

create vxlan successfully with invalid vxlan id for ml2:
curl -i http://127.0.0.1:9696/v2.0/networks -H "X-Auth-Token:$token_id" -H "Content-Type: application/json" -X POST -d '{"network": {"name": "vxlan_test", "admin_state_up": true, "tenant_id": $tenant_id, "provider:network_type": "vxlan", "router:external": false, "shared": false, "provider:segmentation_id": -1}}'

response:
HTTP/1.1 201 Created
Content-Type: application/json; charset=UTF-8
Content-Length: 332
X-Openstack-Request-Id: req-1e9af36d-b742-4c76-bfdf-0cea4df6399f
Date: Fri, 11 Apr 2014 09:25:51 GMT

{
    "network": {
        "status": "ACTIVE",
         "subnets": [

        ],
         "name": "vxlan_test",
         "provider:physical_network": null,
         "admin_state_up": true,
         "tenant_id": "bfed9cd5990c49ad8a42ba36d505c003",
         "provider:network_type": "vxlan",
         "router:external": false,
         "shared": false,
         "id": "5bd9b587-02f8-4432-b0d0-18a126126072",
         "provider:segmentation_id": -1
    }
}

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/89982

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/114605

[Romil Gupta (romilg)]

As discussed with Yang via mail.

I am going to continue working on this bug from his patch set i.e

Fix proposed to branch: master

Review: https://review.openstack.org/#/c/89982/.

I request reviewers to share comments on it.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Romil Gupta (<email address hidden>) on branch: master
Review: https://review.openstack.org/114605
Reason: As discussed with Yang via mail.

I am going to continue working on this bug from his patch set i.e

Fix proposed to branch: master

Review: https://review.openstack.org/#/c/89982/

I request reviewers to share comments on it.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/89982
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=22bec67395b52a879ad4eb37b150eead9d4bb444
Submitter: Jenkins
Branch: master

commit 22bec67395b52a879ad4eb37b150eead9d4bb444
Author: yangxurong <email address hidden>
Date: Thu Apr 24 09:26:22 2014 +0800

    Tunnel ID range validation for VXLAN/GRE networks

    Currently, there is no check which validates the values of
    tunnel range for VXLAN/GRE networks. The VXLAN VNI is 24 bit
    which have range between 1 to 2^24 - 1. Similarly, GRE key field
    is 32 bit which have range between 1 to 2^32 - 1.

    Closes-Bug: #1306488

    Co-Authored-By: romilg <email address hidden>

    Change-Id: Idb3d0f41166df589a1e90394d9319901b5f9b439