This spec would hang due to the use of transactions, and would
incorrectly stub Thread.new.

We cant have project with name 'project' or 'tree' anymore.
This merge request containts a migration that will find and rename all
projects using reserved names by adding N digit to the end of the name.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>