Fix interval check for 2y case in gtime.go

[mertyldrm]

What this PR does / why we need it: Round IntervalFunction under gtime.go file had a faulty condition for 2 years range, since the condition was set to 42 days in ms, every interval longer than 42 days was set to 1 years of interval.

Which issue(s) this PR fixes: This PR fixes the case for 2 years by fixing the condition to 2 years in ms

Fixes
I updated the condition to 63072000000 ms which is 2 years.

Special notes for your reviewer:

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✅ mertyldrm
❌ Yusuf Mert Yıldırım

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[itsmylife]

That's a nice catch. Do you mind adding/updating the unit test related to that value?

[mertyldrm]

there you go, i fixed the failing test and added a new one for the default case

[zoltanbedi]

@mertyldrm your last commit was not made with your GitHub email. Can you please fix that?