[go] respect initialisms or acronyms in names

[tomi77]

Resolved #4833

PR checklist

• Read the contribution guidelines.
• If contributing template-only or documentation-only changes which will change sample output, build the project before.
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[wing328]

Thanks for the PR. Please PM me via Slack when you've time.

[tomi77]

@wing328 Sorry, I don't have Slack. Maybe mail/Hangout? tomasz[dot]rup[at]gmail[dot]com

[wing328]

Sure let's do it via Google Hangout tomorrow (Friday). Please ping me (wing328hk@gmail.com) when you're free. My timezone is +0800.

[displague]

Is Exeptions typo'd before this PR? (missing c)

Does this functionality, changing client APIs, need to be behind a generator user flag?

[yuki2006]

Any updates?

[wing328]

we've added name mapping support to the go generators which should allow users to address issues mentioned in this PR: https://github.com/OpenAPITools/openapi-generator/blob/master/docs/customization.md#name-mapping

please give it a try with the latest master.