Robot Framework 7.0 changes

Update robot code syntax overall in the repo

Changes:
   - Update the requirement.txt package version for robot
   - The '[Return]' setting is deprecated.
      Use the 'RETURN' statement instead.
   - Singular section headers like '*** Test Case ***'
     are deprecated. Use plural format like
     '*** Test Cases ***' instead.
   - Singular section headers like '*** Variable ***'
     are deprecated

Tested:
   - Ran from sandbox with the version
     $ robot --version
     Robot Framework 7.0 (Python 3.10.12 on linux)

     and also tested on latest python version

     Robot Framework 7.0 (Python 3.11.9 on linux)

Change-Id: I54e85f9d799556c63b9a39f79483f83e9b980768
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/systems/eventlog/test_esel.robot b/redfish/systems/eventlog/test_esel.robot
index 84d025d..d1947e3 100644
--- a/redfish/systems/eventlog/test_esel.robot
+++ b/redfish/systems/eventlog/test_esel.robot
@@ -167,7 +167,7 @@
     [Documentation]  Run the IPMI command and return the output.
     [Arguments]    ${args}
     ${output_1}=    Execute Command   /tmp/ipmitool -I dbus raw ${args}
-    [Return]    ${output_1}
+    RETURN    ${output_1}
 
 
 Check IPMI OEMpartialadd Reject
@@ -176,7 +176,7 @@
     Login To OS Host  ${OS_HOST}  ${OS_USERNAME}  ${OS_PASSWORD}
     ${stdout}  ${stderr}  ${output_2}=  Execute Command  ipmitool raw ${args}
     ...        return_stdout=True  return_stderr=True  return_rc=True
-    [Return]  ${stderr}
+    RETURN  ${stderr}
 
 
 Test Setup Execution
@@ -213,7 +213,7 @@
     ${stdout}  ${stderr}  ${output_3}=  Execute Command  ipmitool raw ${args}
     ...         return_stdout=True  return_stderr=True  return_rc=True
     Should Be Equal  ${output_3}  ${0}  msg=${stderr}
-    [Return]  ${stderr}
+    RETURN  ${stderr}
 
 
 Event Log Should Exist
diff --git a/redfish/systems/eventlog/test_event_logging.robot b/redfish/systems/eventlog/test_event_logging.robot
index 498f943..8aa676b 100644
--- a/redfish/systems/eventlog/test_event_logging.robot
+++ b/redfish/systems/eventlog/test_event_logging.robot
@@ -435,7 +435,7 @@
       Append To List  ${error_ids}  ${error_id}
     END
 
-    [Return]  ${error_ids}
+    RETURN  ${error_ids}
 
 
 Event Log Should Not Exist
diff --git a/redfish/systems/test_powersubsystem_settings.robot b/redfish/systems/test_powersubsystem_settings.robot
index bb45fd0..c38dbe1 100755
--- a/redfish/systems/test_powersubsystem_settings.robot
+++ b/redfish/systems/test_powersubsystem_settings.robot
@@ -121,7 +121,7 @@
     # {'@odata.id': '/redfish/v1/Chassis/chassis/PowerSubsystem/PowerSupplies/powersupply1'}
     # {'@odata.id': '/redfish/v1/Chassis/chassis/PowerSubsystem/PowerSupplies/powersupply2'}
     # {'@odata.id': '/redfish/v1/Chassis/chassis/PowerSubsystem/PowerSupplies/powersupply3'}
-    [Return]  ${total_num_powersupplies}
+    RETURN  ${total_num_powersupplies}
 
 
 Set and Verify Power Mode Switches
diff --git a/redfish/systems/test_sensor_monitoring.robot b/redfish/systems/test_sensor_monitoring.robot
index bea0a57..f3a1bfe 100644
--- a/redfish/systems/test_sensor_monitoring.robot
+++ b/redfish/systems/test_sensor_monitoring.robot
@@ -137,7 +137,7 @@
         Append To List  ${sensor_name_list}  ${sensor_info['MemberId']}
     END
 
-    [Return]  ${sensor_name_list}
+    RETURN  ${sensor_name_list}
 
 
 Check Sensor Status And Reading Via Sensor Name
diff --git a/redfish/systems/test_systems_inventory.robot b/redfish/systems/test_systems_inventory.robot
index 0ec05c8..c3e24e2 100755
--- a/redfish/systems/test_systems_inventory.robot
+++ b/redfish/systems/test_systems_inventory.robot
@@ -175,7 +175,7 @@
 
     ${total_cores}=  Redfish.Get Attribute  ${processor}  TotalCores
     Return From Keyword If  ${total_cores} is ${NONE}  ${0}
-    [Return]  ${total_cores}
+    RETURN  ${total_cores}
 
 
 GPU State Check
@@ -212,7 +212,7 @@
     ${power_supplies}=  Redfish.Get Attribute
     ...  ${REDFISH_CHASSIS_URI}${CHASSIS_ID}/Power  PowerSupplies
 
-    [Return]  ${cpu_info}  ${gpu_info}  ${power_supplies}
+    RETURN  ${cpu_info}  ${gpu_info}  ${power_supplies}
 
 
 Verify FRU Inventory Minimums