Get the Last system inventory time

These changes provide the last time System Inventory
collection On Reboot(CSIOR) was performed from dracclient.
The value is represented as yyyymmddHHMMSS format.

Change-Id: I73ff5eb517528afe56b5cf45a74fa5d5519db186
Closes-Bug: #1894938

dracclient/resources/inventory.py

@@ -59,7 +59,8 @@ NIC = collections.namedtuple(
 
 System = collections.namedtuple(
     'System',
-    ['id', 'lcc_version', 'model', 'service_tag', 'uuid'])
+    ['id', 'lcc_version', 'model', 'service_tag', 'uuid',
+     'last_system_inventory_time'])
 
 
 class InventoryManagement(object):
@@ -210,7 +211,9 @@ class InventoryManagement(object):
             service_tag=self._get_system_attr(drac_system, 'ServiceTag'),
             model=self._get_system_attr(drac_system, 'Model'),
             lcc_version=self._get_system_attr(drac_system,
-                                              'LifecycleControllerVersion'))
+                                              'LifecycleControllerVersion'),
+            last_system_inventory_time=self._get_system_attr(
+                drac_system, 'LastSystemInventoryTime').split('.')[0])
 
     def _get_system_attr(self, drac_system, attr_name):
         return utils.get_wsman_resource_attr(drac_system,

dracclient/tests/test_inventory.py

@@ -139,7 +139,8 @@ class ClientInventoryManagementTestCase(base.BaseTest):
             uuid='ebd4edd3-dfd7-4c7d-a2c8-562b3c23b811',
             service_tag='A1B2C3D',
             model='PowerEdge R630',
-            lcc_version='2.1.0')
+            lcc_version='2.1.0',
+            last_system_inventory_time='20200902160859')
         mock_requests.post(
             'https://1.2.3.4:443/wsman',
             text=test_utils.LifecycleControllerEnumerations[

dracclient/tests/wsman_mocks/system_view-enum-ok.xml

@@ -17,6 +17,7 @@
           <n1:LifecycleControllerVersion>2.1.0</n1:LifecycleControllerVersion>
           <n1:Model>PowerEdge R630</n1:Model>
           <n1:ServiceTag>A1B2C3D</n1:ServiceTag>
+          <n1:LastSystemInventoryTime>20200902160859</n1:LastSystemInventoryTime>
           <n1:UUID>ebd4edd3-dfd7-4c7d-a2c8-562b3c23b811</n1:UUID>
         </n1:DCIM_SystemView>
       </wsman:Items>