fix(Usage Reports): add optional name parameters to struct

[KRuelY]

PR summary

add optional name parameters to data type

PR Checklist

Please make sure that your PR fulfills the following requirements:

• The commit message follows the Angular Commit Message Guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Current vs new behavior

Names will now show up when the optional parameter _names is passed

Does this PR introduce a breaking change?

• Yes
• No

Other information

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Ran 65 of 65 Specs in 12.685 seconds
SUCCESS! -- 65 Passed | 0 Failed | 0 Pending | 0 Skipped
PASS
ok  	github.com/IBM/platform-services-go-sdk/usagereportsv4	12.953s

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[Andras-Csanyi]

LGTM

[padamstx]

LGTM
Let's wait until the PRs in the other SDKs are reviewed/approved before merging this one in.

[ibm-devx-sdk]

🎉 This PR is included in version 0.19.2 🎉

The release is available on GitHub release

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