LOG-2032: Update fluent kubernetes metadata filter to allow reading f…

[jcantrill]

…rom /var/log/pods

Description

This PR:

• Updates the fluent-plugin-kubernetes_metadata to allow reading logs from /var/log/pods
• Preps functional tests for vector
• Blocks https://github.com/openshift/cluster-logging-operator/pull/1273

Links

• https://issues.redhat.com/browse/LOG-2032

[jcantrill]

cc @vimalk78 @alanconway

[jcantrill]

/retest

[jcantrill]

/retest

[jcantrill]

/retest

[jcantrill]

/retest

[jcantrill]

/retest

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alanconway, jcantrill

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/openshift/origin-aggregated-logging/blob/master/OWNERS)~~ [alanconway,jcantrill] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[jcantrill]

/retest

[openshift-ci[bot]]

@jcantrill: all tests passed!

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