increase requirejs waitSeconds

occasionally users connections are very slow,
no need to error out on the page

fixes CNVS-13542

Change-Id: I49e0873b42bb7bb53c73d9b37d95dee00be0a733
Reviewed-on: https://gerrit.instructure.com/38233
QA-Review: August Thornton <august@instructure.com>
Product-Review: Matt Fairbourn <mfairbourn@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
Reviewed-by: Brian Palmer <brianp@instructure.com>
Tested-by: Matt Fairbourn <mfairbourn@instructure.com>