Steven Hardy 604595a39c Update preview_update_stack to align with PATCH updates ... Currently attempting to do a preview update call with PATCH fails, because we didn't align the behavior of preview update with the actual update in the recent additions to fix bug #1224828 So, refactor to ensure both preview_update & update use the same code, and add a PATCH path to the update API. Change-Id: I8ce5c0ea4035a7b9563db10ea10433e7f5f99a4f Closes-Bug: #1501207		2015-10-01 19:05:07 +01:00
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heat	Update preview_update_stack to align with PATCH updates	2015-10-01 19:05:07 +01:00