Bug in `test_helper` report name validation.

[nathan-at-least]

The regular expression used to validate a report's test_helper field on line #129 of oonib/report/handlers.py is ill-specified:

• The regexp variable dereferenced is a loop index above.
• The referent will be the last value of the loop index, which depends on the sort order of dict.iteritems which is not specified and may change between versions or runtimes.

This was verified by source code inspection and I haven't performed any tests yet. It's conceivable that regexp just so happens to consistently refer to a regular expression which accepts relevant test spec names, but this would be coincidence.

[hellais]

Yes you are right, I pushed a fix for this. Thanks for noting this.