More specific workaround for no rows in TreeTable with pagelenght = 0 (#9203)

svn changeset:25915/svn branch:6.8

Conflicts:
	client/src/com/vaadin/client/ui/VScrollTable.java

Change-Id: I3f5b9dc988f5911023f77f184f5bd6770bbd9f1b
Warn if using old widgetset (#11836)

Change-Id: Id7332da3468572f4df55aa7b3fed39ef811fe09d
Verify that tests are run with the expected JRE version (#11835)

Change-Id: I77b48cc646776a452204e2c93954fdd1eea7e4de
Revert "Assert that connector needing layout is attached (#11698)"

This reverts commit cb7b02d4e50e91b9377410e79c3578587a900d94

The assert is not a good idea because it is triggered when a connector registers a dependency in its init method.

Merge: no

Change-Id: I1f5a99af8f0af7b3329a1a596073ba09e55e18dc
Merge changes from origin/7.1

55ea6dc More specific workaround for no rows in TreeTable with pagelenght = 0 (#9203)
dca728c Warn if using old widgetset (#11836)
936439d Verify that tests are run with the expected JRE version (#11835)

Change-Id: I0a19ce453cd4215d3bc48a67494d06ff4fe85e8e
No-op merge from origin/7.1

7a1ab60 Revert "Assert that connector needing layout is attached (#11698)"

Change-Id: I7a89760ff502e2957d0b6d489fa93de5582e164e