spec add wait_for_ajaximations
spec add wait_for_ajaximations

fixes QA-600

spec/selenium/outcomes/outcome_gradebook_spec.rb:283
add a wait_for_ajaximations after selecting section to wait for
page to load new data.

Test Plan
	Jenkins Passes

Change-Id: Iab7f589b012ea025de9dc0689823003a090bdfb1
Reviewed-on: https://gerrit.instructure.com/169038
Tested-by: Jenkins
Reviewed-by: Robert Lamb <bf934bf7cdbebe5899399a138c0cb75c4d783999@instructure.com>
QA-Review: Robert Lamb <bf934bf7cdbebe5899399a138c0cb75c4d783999@instructure.com>
Product-Review: Robert Lamb <bf934bf7cdbebe5899399a138c0cb75c4d783999@instructure.com>

instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms