Merge pull request #280 from eric-wu/develop

Bootstrap the trash can folder. Add trash can table and DAO.
Merge pull request #281 from eric-wu/develop

Changes to address feedback on pull request 280
PLFM-1675: Fixed Submission constraints
PLFM-1663: Require READ permission on submitted Entities
Default to use Entity name for Submissions
Code review changes
Merge pull request #279 from bkng/develop

Competition Services improvements