tests: Await for graph switch before testing open fop count

In performance/open-behind.t, a test for open fop reaching the brick is done by
switching off open-behind and performing a read operation. If the read operation
is performed before a graph switch, the read happens on the old graph and hence
open does not get accounted in the brick.

To overcome this EXPECT_WITHIN 10 seconds has now been added to ensure that a
graph switch has happened. The read operation happens subsequently after the
graph switch.

Cleaned up a "No volumes present" message from stderr while doing this.

Change-Id: I05f7cbfd1ce51782f5ab778468a980d3732509a2
BUG: 1225077
Signed-off-by: Vijay Bellur <vbellur@redhat.com>
Reviewed-on: http://review.gluster.org/10941
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: NetBSD Build System
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>

0 files changed, 0 insertions, 0 deletions