Fix Tooltip_mouse test failure in IE11 due to floating point measurements
Prevent spurious test failure.  Tab 5 with inner tab 1 selected is the same height or near the same height as Tab 4 with inner tab 2 selected... so don't test for a height difference.  Plus which it's silly to test the same behavior 8 times.   Refs #11488.

git-svn-id: http://svn.dojotoolkit.org/src/dijit/trunk@30952 560b804f-0ae3-0310-86f3-f6aa0a117693
(cherry picked from commit 7a290647eb41e92e261a7e37153e420e748599c5)

Conflicts:
	tests/layout/robot/TabContainer_noLayout.html
Fix failure due to rounding in BorderContainer_complex 'resize accordion' test