Add MicroShift Prometheus Exporter

[agullon]

Which issue(s) this PR addresses:

Closes #<Issue Number>

[agullon]

@ggiguash should I, do we need a ticket for this?

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[ggiguash]

/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: agullon, ggiguash

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