Fix cyclomatic complexity in KSM files

[venkatbvc]

Fix cyclo complexity in horizontalpodautoscaler file function is hpaMetricFamilies

What this PR does / why we need it:
This PR is to fix cyclomatic issues found in KSM. As there are many files. fixing one file at a time so that it easy for reviewers
How does this change affect the cardinality of KSM: (increases, decreases or does not change cardinality)
No change to cardinality
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 #

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[venkatbvc]

/cc @rexagod
As told in PR:2060, i will push incremental changes. Currently i pushed it for horizontalpodautoscaler.go Can you please review

[venkatbvc]

@rexagod Can you please have a look at the changes for horizontalpodautoscaler? Once this is merged i will push for other files one after another

[dgrisonnet]

LGTM, thank you @venkatbvc :)

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dgrisonnet, venkatbvc

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