modify method to get service in endpoint related event

[kaiiyvwu]

What type of PR is this?

/kind bug

What this PR does / why we need it:

While ccm init, if get service by client it will spend more time and cannot process all endpoint create event quickly. Getting Service by cache will speed up catch all endpoint event.

Which issue(s) this PR fixes:

Fixes #412

Special notes for your reviewer:

Does this PR introduce a user-facing change?

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

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[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kaiyuu800Q
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/lifecycle stale