Regression test portability: basic/afr/resolve.t

Final test in basic/afr/resolve.t checks for a failure after
breaking the backend. But since the tested file was accessed
just before that operations, it may still be in kernel page
cache. As a result, file read is handled by kernel cache and
never sent to the filesystem, and the test is successful
where it should have failed.

Fix this by waiting 10s before reading the supposed-to-be-broken
file.

BUG: 1129939
Change-Id: I97efc00bc8a5f954b1df786cdede468af8bf6485
Signed-off-by: Emmanuel Dreyfus <manu@netbsd.org>
Reviewed-on: http://review.gluster.org/9075
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com>