increase resource limits for kubefed controller

[zryfish]

What this PR does / why we need it:
Default resource limits in the chart is too low now, it's easy to cause OOM issues, like #1235. Enlarge kubefed controller resource limits would cover more cases.

  resources:
    limits:
      cpu: 100m
      memory: 128Mi

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #1235

Special notes for your reviewer:

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[RainbowMango]

/lgtm
/assign @hectorj2f

[hectorj2f]

Please, raise it to 500m, we have this limit for the CPU

[zryfish]

fixed

[hectorj2f]

Please, set the cpu limit to 500m, we saw that value to work well on big clusters. I'll allocate 1Gi as memory limit.

[hectorj2f]

/lgtm

[hectorj2f]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hectorj2f, zryfish

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