rados_bencher.h: 	bench_write and bench_seq will now wait on any write/read 	rather than the one least recently started.
rados_bencher.h:
	bench_write and bench_seq will now wait on any write/read
	rather than the one least recently started.

	bench_write adds its pid to the BENCH_DATA object

	bench_read uses the pid in BENCH_DATA to generate the object
	names to read.

Signed-off-by: Samuel Just <080670f7d9c6f3eb64055fc3fc7c93ba2c444c40@hq.newdream.net>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph