utils: modify hostnames for bluetooth test DUTs

BUG=None
TEST=Run the script as $ ./probe_bluetooth_duts.sh

Change-Id: I1ffc34a8a732dd48d043723fdf86777be22f2355
Reviewed-on: https://chromium-review.googlesource.com/849392
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Ruchi Jahagirdar <rjahagir@chromium.org>
Reviewed-by: Shyh-In Hwang <josephsih@chromium.org>
diff --git a/utils/probe_bluetooth_duts.sh b/utils/probe_bluetooth_duts.sh
index 60914fd..f1027ab 100755
--- a/utils/probe_bluetooth_duts.sh
+++ b/utils/probe_bluetooth_duts.sh
@@ -7,13 +7,13 @@
 # This script probes the readiness of the DUTs and chameleon boards in
 # the wifi-cells in the test lab.
 
-BT_HOSTS="chromeos9-row4-rack7-host1
-          chromeos9-row4-rack7-host2
-          chromeos9-row4-rack7-host3
-          chromeos9-row4-rack7-host4
-          chromeos9-row4-rack8-host1
-          chromeos9-row4-rack8-host2
-          chromeos9-row4-rack8-host3"
+BT_HOSTS="chromeos15-row1-rack4-host1
+          chromeos15-row1-rack4-host2
+          chromeos15-row1-rack4-host3
+          chromeos15-row1-rack5-host1
+          chromeos15-row1-rack5-host2
+          chromeos15-row1-rack5-host3
+          chromeos15-row1-rack5-host4"
 
 SSH_OPTIONS="-q -i ~/.ssh/.test_rsa \
              -o UserKnownHostsFile=/dev/null \