sanger/sequencescape — pull request #714 by JamesGlover (2013-01-07 17:13:42+00:00)
Title: 2998045 29980907 correct invalid create asset requests

CAUTION: Migrations take ~47m run. (Under mri, although was of a similar length when I tested with jruby)

1) Adds validation to create asset request to ensure only generated for appropriate assets
2) Removes instances where CreateAsset requests were being created for inappropriate assets
3) Removes create asset requests for inappropriate assets.