Test for later jmeter versions

[oliverlloyd]

Make sure we handle the autoflush feature in jmeter.properties

# AutoFlush on each line written in XML or CSV output
# Setting this to true will result in less test results data loss in case of Crash
# but with impact on performances, particularly for intensive tests (low or no pauses)
# Since JMeter 2.10, this is false by default
# jmeter.save.saveservice.autoflush=false

[oliverlloyd]

Closed: 7ad325c