[k8s]: Avoid limitation to have multiple k8s_master configured

[Pulkit Tandon]

As of now, we support only 1 k8s master.
And we can have a HA setup with multiple contrail-kube-managers running.

But at the same time, we have a limitation in HA setup contrail-ansible-deployer provisioning, that we need to mention k8s_master role and kube_manager role together on all the nodes.

Though, k8s_master role will get installed on only 1 node, we need to mention this role at every Kube-manager.

This further affects our test runs where it reads the contrail-test-inputs file and populate k8s_master info.
It can get wrong node IP in a HA setup due to this limitation.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/42720
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/42721
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/42720
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/42721
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/42720
Committed: http://github.com/Juniper/contrail-test/commit/31d66391651d02bd57bf9f9e283953d0f0b1f13f
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit 31d66391651d02bd57bf9f9e283953d0f0b1f13f
Author: Pulkit Tandon <email address hidden>
Date: Thu May 3 09:00:44 2018 +0530

Enhanced the test code to pick the correct k8s_master IP out of the list
of k8s_master role mentioned in contrail_test_inputs.yaml
Apart from this, changed a ContrailStatusChecker check to verify only
restarted service status to ignore other services in case they are already
down but non affecting

Closes-bug: #1768714
Change-Id: I5f3d4634a5b9a0ff26a5cc7e8a8f9d0ea61734b4

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/42721
Committed: http://github.com/Juniper/contrail-test/commit/971bf4af35459254ff16b1640aadc6676811f3f7
Submitter: Zuul v3 CI (<email address hidden>)
Branch: R5.0

commit 971bf4af35459254ff16b1640aadc6676811f3f7
Author: Pulkit Tandon <email address hidden>
Date: Thu May 3 09:00:44 2018 +0530

Enhanced the test code to pick the correct k8s_master IP out of the list
of k8s_master role mentioned in contrail_test_inputs.yaml

Closes-bug: #1768714
Change-Id: I5f3d4634a5b9a0ff26a5cc7e8a8f9d0ea61734b4

[Pulkit Tandon (pulkitt)]

Getting verified since long.
Last verified on R5.0-77 and master-117