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}