SELENIUM-283 - Bump the JSErrorCollector to 0.7-atlassian-1. We now get a bunch more useful info from the browser.

In this update, errors reported from Firefox will include:

• The URL the error originated from

• The column number for the error (important for minified files)

• A stack trace to show where the error came from

• Error categories for the particular errors being thrown (e.g., whether the thing is an Exception, a Warning, or just logged information)