Sage-Bionetworks/Synapse-Repository-Services — pull request #943 by kaysoky (2013-12-20 00:49:47+00:00)
Title: Add flag to disable preview generation for new file handles

Additive change to two request objects to include a new boolean flag.
If set to false, file handles should be deletable without race conditions with the PreviewWorker

If used correctly, should prevent timing related issues in some integration tests. And can be used to reduce extraneous file handles and S3 files for messages and wikis.