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/lib/external_intf/management_console_utils.robot b/lib/external_intf/management_console_utils.robot
index 5b1c0ac..f7ab82b 100644
--- a/lib/external_intf/management_console_utils.robot
+++ b/lib/external_intf/management_console_utils.robot
@@ -59,7 +59,7 @@
     Set To Dictionary  ${session_info}  SessionToken  ${XAUTH_TOKEN}
     Set To Dictionary  ${session_info}  SessionResp  ${session_resp}
 
-    [Return]  ${session_info}
+    RETURN  ${session_info}
 
 
 Create Session With List Of ClientID
@@ -78,7 +78,7 @@
       Append To List  ${session_dict_list}  ${session_dict}
     END
 
-    [Return]  ${session_dict_list}
+    RETURN  ${session_dict_list}
 
 
 Verify A Session Created With ClientID
@@ -126,5 +126,5 @@
     ...  json.load(open('${code_base_dir_path}data/resource_lock_table.json'))  modules=json
     Rprint Vars  resource_lock_json
 
-    [Return]  ${resource_lock_json}
+    RETURN  ${resource_lock_json}
 
diff --git a/lib/external_intf/vmi_utils.robot b/lib/external_intf/vmi_utils.robot
index 7532b3d..f0c6e86 100644
--- a/lib/external_intf/vmi_utils.robot
+++ b/lib/external_intf/vmi_utils.robot
@@ -145,7 +145,7 @@
     ...  IPv4_Address=${ip_resp["IPv4Addresses"]}  Name=${ip_resp["Name"]}
     ...  InterfaceEnabled=${${ip_resp["InterfaceEnabled"]}}
 
-    [Return]  &{vmi_ip}
+    RETURN  &{vmi_ip}
 
 
 Get VMI Interfaces
@@ -168,7 +168,7 @@
         Append To List  ${interface_list}  ${interface_value}
     END
 
-   [Return]  @{interface_list}
+   RETURN  @{interface_list}
 
 
 Verify VMI EthernetInterfaces
@@ -208,4 +208,4 @@
     Set Static IPv4 Address To VMI And Verify  ${vmi_ip}  ${bmc_ip_data[0]['Gateway']}
     ...  ${bmc_ip_data[0]['SubnetMask']}  ${valid_status_code}  ${interface}
 
-    [Return]   ${vmi_ip}  ${bmc_ip_data}
+    RETURN   ${vmi_ip}  ${bmc_ip_data}