Downgrade to JGroups 3.2.11.Final and remove async request handling
# This is a combination of 4 commits.
# The first commit's message is:
Single-machine stress test

# The 2nd commit message will be skipped:

#	optimized udp.xml

# The 3rd commit message will be skipped:

#	UNICAST3

# The 4th commit message will be skipped:

#	write from all nodes to all nodes and bigger OOB pools
optimize away HashSet with single-key tx
don't set exclusion list unless broadcasting
if (trace)
smaller number of requests
switch to 4 nodes
fix CARD
use jgroups 3.2.11.Final