Fix arrayIndexOutOfBounds exception for overloaded addModelMap method

[yaohui-wyh]

Fix java.lang.ArrayIndexOutOfBoundsException from YamlExample

Repro case:

# from $REPO_DIR/examples/examples-release-15
../../mvnw exec:java -Dexec.mainClass="io.kubernetes.client.examples.YamlExample"

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• ✅ Yaohui Wang (482b2b7)

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[yaohui-wyh]

I signed it

[yue9944882]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: yaohui-wyh, yue9944882

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