- Fix Datetime rounding in RLMConvertBsonToRLMBSON

[anton-plebanovich]

I noticed that the Date types returned from Sync Functions calls are rounded to seconds. This PR fixes the issue. Please note that I am not a C++ programmer so this probably could be done in a better way. I will gladly accept any fix requests with hints.

[cla-bot]

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[anton-plebanovich]

@cla-bot check

[cla-bot]

The cla-bot has been summoned, and re-checked this pull request!

[aehlke]

@anton-plebanovich are you able to merge or do we need to summon mongodb staff..?

[anton-plebanovich]

I cannot merge and of course, someone from the Realm team has to review first since there might be unforeseen side effects I am unaware of.

[aehlke]

Realm is dead and no one at MongoDB is assigned to review PRs. Probably we need to organize around a community fork

[anton-plebanovich]

We are moving away from Realm Sync and are using Functions as an intermediate step. Thus, this change was needed to receive valid responses. I have created a fork for myself but this is only temporarily needed until we finish our transition so I don't want to spend more effort than needed here.