Null check for plugins in scroller helper.
@rev john.huang@
@bug W-2439891@

Automation for autocomplete accessibility attributes
@bug W-2406824@
@rev ronak.shah@

add step for esacpe key.

Automation for sorting on an empty data grid
@bug W-2396201@
@rev mkohanfars@

Dev code not pushed into master yet, commenting out tests for now.
Merge branch 'ctatlah/master-pending-testIntegrationsFrom194'