Correct assertion message which changed due to #12915

Converted to TB3 to allow running on only one browser

Change-Id: I8a0d20cfb5af798d8b89f3fca86ef7d9d7a37527
Test for broken Webkit feature which causes extra scrollbars (#12736, #12727)

This is the original cause for the Vaadin issues

Live test at http://artur.virtuallypreinstalled.com/webkit-scrollbars.html

Change-Id: Iaf9a46b635fabcb7cd795547c782c596aa57ce12
Allow excluding test from the standard test suite

Mostly useful for very long running tests

Change-Id: I9027f981da0a1e6ba464196449f2a9c27e965d2f
Disable client timeout so websockets are not disconnected when idle (#13015)

Updated sleep method to ensure that long sleeps can be performed without losing
the connection to the browser

Change-Id: I4f29d946e7a9a400e303e3a574876e1bc2d56773
Test for pushing for an extended period of time (24h)

Change-Id: I8e47ba926f41fdc103cfa72ba85ca2f9edbc57d0
Fix compilation error

Change-Id: Ib2ca104b8ab92a23a525c617004c6efe7f7edc14
Do not throw NPE if conversion messages is null (#12962)

Change-Id: Ie2b95ed4da89e2c5ab8b462300a6f4bd28dc7570
Timeout redirect timer is reset on server activity (#12446)

Change-Id: Iec2e3de627bc1cf5c7d39bf98715b1bf343e7519
Fixes right click selection focus issues in Tree. (#12618)

Change-Id: I1057424fc8956b05e15a92c32e48a767e9fc8df9
Merge changes from origin/7.1

74dcb6f Correct assertion message which changed due to #12915
12b6a8b Test for broken Webkit feature which causes extra scrollbars (#12736, #12727)
ea46029 Allow excluding test from the standard test suite
c171850 Disable client timeout so websockets are not disconnected when idle (#13015)
36fce65 Test for pushing for an extended period of time (24h)
54a5667 Fix compilation error
25fc48c Do not throw NPE if conversion messages is null (#12962)
26b5b67 Timeout redirect timer is reset on server activity (#12446)
d45785d Fixes right click selection focus issues in Tree. (#12618)

Change-Id: I3cef915ee46b77ca0f188296cfa343cde1ad59e6