In api.content.create, avoid renaming object if "id" was not given

Hi @jensens @ale-rt

we discovered that when creating an element using content.create without specifying an "id", it was created then renamed, this cause ContainerModified event to be called 2 times (and some other events too).

I wondered why this was done in 2 steps? Could it be done before creating the element?
https://github.com/plone/plone.api/blob/master/src/plone/api/content.py#L118
Actually the element is created and if id is not given, then it is renamed to a computed id.
I think we could check if "id" is given, then generate it and pass it to invokeFactory instead renaming it after?
Or is there some reason why it is done after?

We could propose a PR "solving" this.

We avoid this by passing a generated id to content.create now.

Thank you,

Gauthier