spec: skip flaky tiny mce editor plugins spec
spec: skip flaky tiny mce editor plugins spec

test plan: jenkins passes

Change-Id: Ieb0626acd3c60ead20c876187decd9cca81d27c1
Reviewed-on: https://gerrit.instructure.com/151003
Tested-by: Jenkins
Reviewed-by: Ryan Taylor <2eafa1f6bf34395b543d6ca7f438461b0774d24f@instructure.com>
Product-Review: Robert Lamb <bf934bf7cdbebe5899399a138c0cb75c4d783999@instructure.com>
QA-Review: Robert Lamb <bf934bf7cdbebe5899399a138c0cb75c4d783999@instructure.com>

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