Modify test use FileInterface::getIdentifier
Merge branch 'master' into modify-file-repository-test
Merge pull request #84 from toiee/modify-file-repository-test

Modify file repository test
Add tearDown for DB cleaning
Merge pull request #86 from toiee/fix-file-repository-test

Add tearDown for DB cleaning
Merge branch 'master' into file-manager
Modify FileInterface and implement
Modify FileRepositoryInterface and implement
Add test for FileRepositoryInterface::factory
Add test for FileManager
Change FileManager.

Change Identifier regex to disallow symbol at start or end of identifier.
Allow empty param at getStorageDriver
Add FileServiceProvider for IoC