Need to check uniqueness of the tag value in its scope

[Senthilnathan Murugappan]

We shouldn't allow creation of same tag values with the same fqname.

root@a2s36:~# curl -s -uadmin:contrail123 http://127.0.0.1:8095/tags | python -mjson.tool
{
    "tags": [
        {
            "fq_name": [
                "application=hr"
            ],
            "href": "http://127.0.0.1:8095/tag/0e1898c8-6389-4b57-acad-483a0e155ee5",
            "uuid": "0e1898c8-6389-4b57-acad-483a0e155ee5"
        },
        {
            "fq_name": [
                "application=hr"
            ],
            "href": "http://127.0.0.1:8095/tag/e8e406e4-8e33-41a9-a159-a3e85a3ce744",
            "uuid": "e8e406e4-8e33-41a9-a159-a3e85a3ce744"
        },
        {
            "fq_name": [
                "default-domain",
                "admin",
                "application=eng"
            ],
            "href": "http://127.0.0.1:8095/tag/8879094c-3411-4f91-a959-ebc2e2366061",
            "uuid": "8879094c-3411-4f91-a959-ebc2e2366061"
        },
        {
            "fq_name": [
                "default-domain",
                "admin",
                "application=eng"
            ],
            "href": "http://127.0.0.1:8095/tag/4d97c820-2bf5-489d-bb32-fbc0d5457caf",
            "uuid": "4d97c820-2bf5-489d-bb32-fbc0d5457caf"
        }
    ]
}

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/37540
Submitter: ?douard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/37544
Submitter: ?douard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/37544
Committed: http://github.com/Juniper/contrail-controller/commit/9f1d3288c5bd75bef0d9a1279771a6977b3556c2
Submitter: Zuul (<email address hidden>)
Branch: R4.1

commit 9f1d3288c5bd75bef0d9a1279771a6977b3556c2
Author: Édouard Thuleau <email address hidden>
Date: Wed Nov 15 17:22:05 2017 +0100

[config] Ensure Tag is unique

As Tag fq_name consists in the type and value, the Tag should be unique.
But before that patch, the Tag fq_name was build after the API verified
the fq_name uniqueness.
Also fix the unit test which returned a false positive result.

Change-Id: I6aa03270cdd9e5bdc46c3d1e9b1dd6d2f8c9d842
Closes-Bug: #1731817

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/37540
Committed: http://github.com/Juniper/contrail-controller/commit/ebdade3f55688db4853563fc398d1a8bf1eefcf4
Submitter: Zuul (<email address hidden>)
Branch: master

commit ebdade3f55688db4853563fc398d1a8bf1eefcf4
Author: Édouard Thuleau <email address hidden>
Date: Wed Nov 15 17:22:05 2017 +0100

[config] Ensure Tag is unique

As Tag fq_name consists in the type and value, the Tag should be unique.
But before that patch, the Tag fq_name was build after the API verified
the fq_name uniqueness.
Also fix the unit test which returned a false positive result.

Change-Id: I6aa03270cdd9e5bdc46c3d1e9b1dd6d2f8c9d842
Closes-Bug: #1731817