13881 prevent ownership change

#### What does this pull request do?

When a checked-out item was checked back in, ownership of the item was transferred from the original creator to the user who made the change. Proposed change copies local roles from the original content object and applies them to the new copy replacing it. 

#### How should this be manually tested?

User1 adds a page. User2 checks out the page, makes a change and submits for publication. User1 checks in the changed copy. Checking local roles for the page, User1 should be listed as having the Owner role, User2 should not.

#### What are the relevant tickets?

https://dev.plone.org/ticket/13881