rhbz1064106 - Refactor copy trans to use a new transaction for every 20 text flows copied.
rhbz1064106 - Variable renames and refactoring to remove the need for a mutable integer wrapper.
rhbz1064106 - More variable renaming.
Merge pull request #372 from zanata/rhbz1064106

rhbz1064106 - Refactor copy trans to use a new transaction for every 20 text flows copied.