LOG-2972: Update index templates to make labels/namespace_labels nested

[jcantrill]

Description

This PR:

• Update index templates to make labels/namespace_labels nested

cc @alanconway @periklis @xperimental

Links

• https://issues.redhat.com/browse/LOG-2972

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill

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[xperimental]

/lgtm

Content looks fine, the CI failures look like flakes to me, but not 100% sure.

[openshift-ci-robot]

/retest-required

Remaining retests: 2 against base HEAD e84efa1c8c3259a9a3891cf1e951d66e73c02bce and 8 for PR HEAD 0ebb88eba9ce4c0288750f296ef1988eae77ec85 in total

[openshift-ci-robot]

/retest-required

Remaining retests: 1 against base HEAD e84efa1c8c3259a9a3891cf1e951d66e73c02bce and 7 for PR HEAD 0ebb88eba9ce4c0288750f296ef1988eae77ec85 in total

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD e84efa1c8c3259a9a3891cf1e951d66e73c02bce and 6 for PR HEAD 0ebb88eba9ce4c0288750f296ef1988eae77ec85 in total

[periklis]

/override ci/prow/smoke-5-5

[openshift-ci[bot]]

@periklis: Overrode contexts on behalf of periklis: ci/prow/smoke-5-5

In response to [this](https://github.com/openshift/origin-aggregated-logging/pull/2260#issuecomment-1230132410): >/override ci/prow/smoke-5-5 Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[openshift-ci[bot]]

@jcantrill: all tests passed!

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