Fix test.py invocation of sstable_test
Fix test.py invocation of sstable_test

invocation of sstable_test "./test.py  --name sstable_test --mode
release --jenkins a"
ran ... --log_sink=a.release.sstable_test -c1.boost.xml" which caused
the test to fail "with error code -11" fix that.

In addition boost test printout was bad fix that as well

Signed-off-by: Shlomi Livne <6f01bf2e882e3bb6371d28d1418e5f729e7183e6@scylladb.com>
Message-Id: <3af8c4b55beae673270f5302822d7b9dbba18c0f.1453809032.git.6f01bf2e882e3bb6371d28d1418e5f729e7183e6@scylladb.com>

scylladb/scylla,scylladb/scylla,kjniemi/scylla,raphaelsc/scylla,avikivity/scylla,avikivity/scylla,duarten/scylla,raphaelsc/scylla,scylladb/scylla,scylladb/scylla,duarten/scylla,kjniemi/scylla,raphaelsc/scylla,avikivity/scylla,duarten/scylla,kjniemi/scylla