Fix api profile.submit to work with tag & note fields

[colemanw]

Overview

This fixes civicrm/org.civicrm.contactlayout#17

Before

Cannot submit tag or note fields from a profile with the api.

After

Tag field handles adding & removing tags. Note field adds a note if not empty.

[colemanw]

@eileenmcnaughton I think the failures are unrelated.

[eileenmcnaughton]

I agree the test fails are unrelated. I'm going to merge this as it takes us forwards & it is locked in by a test but there is a scenario not fixed by this

Scenario one - save with 2 tags - used to result in failure, now passes
Scenario two - re-save, removing one tag - used to result in failure, now passes & removes the one tag
Scenario three (fails) - re-save, removing all tags. User to result in remaining tag not being deleted, still does.

The issue is that the emptiness is not getting through.

[eileenmcnaughton]

@colemanw this didn't hit 5.6 rc but another one of your patches did target the rc

[colemanw]

Ooh, yes. I'm going to backport this if there are no objections.

[eileenmcnaughton]

I think it's fine to do so