[FIX] *_operating_unit: add check_company in field OU

[Saran440]

Step to test:

1. Add multi company and create OU
   

2. Go to invoice, po, so, exp or else > select Operating Unit field it will show all OU
   

This document created on YourCompany it should select OU that depend on YourCompany only
This PR fixed by add check_company=True in header field.

Exclude: line, compute field, wizard (may be it should add too. but I didn't test)

After add it

[OCA-git-bot]

Hi @max3903, @ps-tubtim,
some modules you are maintaining are being modified, check this out!

[AaronHForgeFlow]

Too bad. It seems OU modules are not multicompany consistent :S

The changes are good to me, and I think we should merge this. Multicompany production instances may need to check their data before applying this change. I will wait for other contributors to give their opinion first.

I think having a commit per module is required in OCA, sorry for the pain.

[Saran440]

@AaronHForgeFlow No problem. I think it’s the right thing to do.
However, should we start fixing this from version 18?

Because so far, no one has multi ou in multi company.

[AaronHForgeFlow]

I don't use this in a multicompany environment and I won't be affected. In any case I think it is best to fix the bug in any version.

[AaronHForgeFlow]

I checked and it seems to be already solved in v17. I did not test v16.

It is ok to merge it and check if needed in v16