lib: state_manager: support x86 platform get OperatingSystemState attribute

Symptom:
When host CPU based on the x86 architecture, the attribute OperatingSystemState
cannot get correctly then cause test case got failed.

Root cause:
Based on x86 architecture, using x86-power-control to manager host power
operation that add OS state interface at "/xyz/openbmc_project/state/os"
this object path. However, "Get Host State Attribute" keyword in
state_manager.robot always using "/xyz/openbmc_project/state/host0" by default.
Thus, cause this OperatingSystemState attribute cannot be found.

x86-power-control:
// OS State Interface
osIface = osServer.add_interface(
    "/xyz/openbmc_project/state/os",
    "xyz.openbmc_project.State.OperatingSystem.Status");

openbmc-test-automation/data/variables.py:
HOST_STATE_URI = /xyz/openbmc_project/state/host0/

Solution:
Add support x86 platform to get OperatingSystemState attribute.

Tested:
Run keyword "Is OS Booted" with -v PLATFORM_ARCH_TYPE:x86
${HOST_STATE_URI} = /xyz/openbmc_project/state/os/

Run keyword "Is OS Booted" with -v PLATFORM_ARCH_TYPE:power
${HOST_STATE_URI} = /xyz/openbmc_project/state/host0/

Related commit:
Suggest Automation test should be adjusted to match the design in this case.
https://gerrit.openbmc-project.xyz/c/openbmc/smbios-mdr/+/51691

Signed-off-by: Tim Lee <timlee660101@gmail.com>
Change-Id: If263c41c45baba0b3901d645f6e139970b3e51d0
diff --git a/data/variables.py b/data/variables.py
index 06271fe..6d15860 100755
--- a/data/variables.py
+++ b/data/variables.py
@@ -45,6 +45,9 @@
 CHASSIS_STATE_URI = OPENBMC_BASE_URI + 'state/chassis0/'
 HOST_WATCHDOG_URI = OPENBMC_BASE_URI + 'watchdog/host0/'
 
+# OS state for x86 architecture
+OS_STATE_URI = OPENBMC_BASE_URI + 'state/os/'
+
 # Logging URI variables
 BMC_LOGGING_URI = OPENBMC_BASE_URI + 'logging/'
 BMC_LOGGING_ENTRY = BMC_LOGGING_URI + 'entry/'
diff --git a/lib/state_manager.robot b/lib/state_manager.robot
index 66df12d..b2fc6b5 100755
--- a/lib/state_manager.robot
+++ b/lib/state_manager.robot
@@ -113,6 +113,9 @@
     # host_attribute   Host attribute name.
     # quiet            Suppress REST output logging to console.
 
+    ${HOST_STATE_URI}=  Set Variable If  '${PLATFORM_ARCH_TYPE}' == 'x86' and '${host_attribute}' == 'OperatingSystemState'
+    ...  ${OS_STATE_URI}  ${HOST_STATE_URI}
+
     ${state}=
     ...  Read Attribute  ${HOST_STATE_URI}  ${host_attribute}  quiet=${quiet}
     [Return]  ${state}