Correct the handler used in serving http requests

[cnmcavoy]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Corrects the handler used serving http requests. The existing handler for pprof and healthz is not wired up correctly and never responds to requests made, when configured.

Which issue(s) this PR fixes:

Fixes #188

Special notes for your reviewer:

N/A

Does this PR introduce a user-facing change?:

Corrects the handler used to serve http requests, the /healthz and /debug/ endpoints are available now.

[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: cnmcavoy
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[k8s-ci-robot]

Hi @cnmcavoy. Thanks for your PR.

I'm waiting for a kubernetes-csi member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[mauriciopoppe]

/ok-to-test
/lgtm
/assign @msau42

Thank you for finding the root cause and quickly submitting a fix!

[VirrageS]

@mauriciopoppe @msau42 Could we merge this and release new version? This blocks updating csi-node-driver-registrar container to newer version as the livenessProbe fails.

[mauriciopoppe]

Merging with the Github UI, I'll work on creating a new patch release