exit on collector error
exit on collector error

Change-Id: I78f655d976fd6f2f99f5f6be2efe2cb0163c0011
Reviewed-on: http://review.couchbase.org/25485
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Pavel Paulau <dd88eded64e90046a680e3a6c0828ceb8fe8a0e7@gmail.com>

pavel-paulau/cbagent,couchbase/cbagent,couchbase/cbmonitor,couchbase/cbmonitor,mikewied/cbagent,vmx/cbagent