State transfer taking too long on node join

The symptoms are basically the same as in previous issue: ISPN-1838

but I didn't want to mix with the old comments in case the cause here is different.

happened in 32 node elasticity test
http://www.qa.jboss.com/~mlinhard/hyperion/run148-elas-dist-32-ER11/logs/analysis/views.html

We start with 16 nodes and add up to 31 nodes when we add the 32nd node the state transfer takes 580sec. previously all state transfers took under 2min.