[master] LOG-4095: fix loki labelKeys that contain slash

[openshift-cherrypick-robot]

This is an automated cherry-pick of #2035

/assign jcantrill

[openshift-ci-robot]

@openshift-cherrypick-robot: An error was encountered cloning bug for cherrypick for bug LOG-4095 on the Jira server at https://issues.redhat.com/. No known errors were detected, please see the full error message for details.

Full error message.

request failed. Please analyze the request body for more details. Status code: 400: {"errorMessages":["Number value expected as the Sprint id."],"errors":{}}

Please contact an administrator to resolve this issue, then request a bug refresh with /jira refresh.

In response to this:

This is an automated cherry-pick of #2035

/assign jcantrill

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[jcantrill]

/approve
/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill, openshift-cherrypick-robot

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[openshift-ci]

@openshift-cherrypick-robot: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/functional-target	f58c669	link	false	/test functional-target
ci/prow/e2e-ocp-target-minus-one	f58c669	link	false	/test e2e-ocp-target-minus-one
ci/prow/e2e-ocp-target-minus-two	f58c669	link	false	/test e2e-ocp-target-minus-two

Full PR test history. Your PR dashboard.

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