Remove rename after creation

[ale-rt]

when calling api.content.create omitting the id the parameter, a random id is first created:

plone.api/src/plone/api/content.py

Line 82 in d2bf668

content_id = not safe_id and id or str(random.randint(0, 99999999))

Then a new id is computed:

plone.api/src/plone/api/content.py

Line 122 in d2bf668

new_id = chooser.chooseName(derived_id, content)

and the object is renamed:

plone.api/src/plone/api/content.py

Line 130 in d2bf668

content.aq_parent.manage_renameObject(content_id, new_id)

I do not see any reason why the final id is not computed immediately saving the rename operation

[ale-rt]

Well we need the content object to actually compute the new_id. Checking anyway if this can be improved.