Increment boot attempts left count for the TC

Changes:
     - Increment boot attempts left count to 3 for the test case
     - 'Verify Boot AttemptsLeft When Power Off'.

Tested:
     - Tested on BMC environment.

Resolves  openbmc/openbmc-test-automation#2224


Change-Id: I75d74c5a0e99e362016bbed501f7ee0556336e81
Signed-off-by: Sridevi Ramesh <sridevra@in.ibm.com>
diff --git a/tests/test_soft_boot_sensors.robot b/tests/test_soft_boot_sensors.robot
index 4775080..1c3fee5 100644
--- a/tests/test_soft_boot_sensors.robot
+++ b/tests/test_soft_boot_sensors.robot
@@ -59,7 +59,7 @@
     [Template]  Validate Boot AttemptsLeft
 
     # System at standby    AttemptsLeft
-    Off                    2
+    Off                    3
 
 
 Verify Boot Sensor States At Ready