Support for attributes with the same field name as attribute name
Use `connection._protocol._ended` state
Merge pull request #2452 from janmeier/fieldSameName

Support for attributes with the same field name as attribute name
Make @mickhansen happy
Update CONTRIBUTING.md
maintain `connection.state` instead

@mickhansen I believe that problem was occurring because
“protocol_error” is a faulty state, not a valid one.
Merge remote-tracking branch 'upstream/master'
Copy the options object in association getters
code coherence
Merge pull request #2453 from findhit/hotfix/mysql-connection-validate

dialects.mysql.connection-manager: Use `connection._protocol._ended` state on $validate
Merge remote-tracking branch 'upstream/master'