Soft sensor progress state test

Added:
   - System boot states mapping.
   - Validate boot count "AttemptsLeft".
   - Validate boot states when power if off.
   - Validate boot states when BMC reset to standby.
   - Validate boot states when host is booting in progress.
   - Validate boot states when host is booted.
   - Validate boot states when BMC reset reload to runtime.

Resolves  openbmc/openbmc-test-automation#930

Change-Id: I1d0c89865fa14361fc1fedc30fcdb46bca342dc5
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/data/variables.py b/data/variables.py
index 0c2a11e..342c5ee 100644
--- a/data/variables.py
+++ b/data/variables.py
@@ -39,6 +39,7 @@
 CHASSIS_POWERON_STATE = 'xyz.openbmc_project.State.Chassis.PowerState.On'
 
 # State Manager URI variables.
+SYSTEM_STATE_URI = '/xyz/openbmc_project/state/'
 BMC_STATE_URI = '/xyz/openbmc_project/state/bmc0/'
 HOST_STATE_URI = '/xyz/openbmc_project/state/host0/'
 CHASSIS_STATE_URI = '/xyz/openbmc_project/state/chassis0/'