proxier: improve node topology event handler logic

[andrewsykim]

Signed-off-by: Andrew Sy Kim kiman@vmware.com

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
Improves logic of the node event handler for Service Topology by returning earlier if the node topology did not change.

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[andrewsykim]

/sig network
/assign @m1093782566 @imroc @thockin

[k8s-ci-robot]

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In response to this:

/sig network
/assign @m1093782566 @imroc @thockin

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[imroc]

Assign to me is not work, I wish I can have the power, I'm going to fire a issue to join the kubernetes org member. @m1093782566 have agreed to be my sponsor, can you agree to be my second sponsor ? @andrewsykim

[andrewsykim]

@imroc sure thing, ping me in the issue

[thockin]

Thanks!

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andrewsykim, thockin

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[andrewsykim]

/retest

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