Refactor Linux SNMP DiskIO robot test to robot-example-CTOR-744 (#5096)

tests/robot/os/linux/snmp/list-diskio.robot

@@ -0,0 +1,36 @@
+*** Settings ***
+Documentation       Check the list-diskio mode
+
+Resource            ${CURDIR}${/}..${/}..${/}..${/}..${/}resources/import.resource
+
+Test Timeout        120s
+
+
+*** Variables ***
+${CMD}                  ${CENTREON_PLUGINS} --plugin=os::linux::snmp::plugin
+
+
+*** Test Cases ***
+List diskio ${tc}
+    [Documentation]    Check the number of returned disks
+    [Tags]    os    linux    snmp    service-disco
+    ${command}    Catenate
+    ...    ${CMD}
+    ...    --mode=list-diskio
+    ...    --hostname=127.0.0.1
+    ...    --snmp-version=2
+    ...    --snmp-port=2024
+    ...    --disco-show
+    ...    --snmp-community=${snmpcommunity}
+    ${output}    Run    ${command}
+    ${nb_results}    Get Element Count
+    ...    ${output}
+    ...    label
+    Should Be Equal As Integers
+    ...    ${expected_result}
+    ...    ${nb_results}
+    ...    Wrong output result for command:{\n}{\n}${command}{\n}{\n}Command output:{\n}{\n}${output}
+
+    Examples:         tc  snmpcommunity                     expected_result    --
+            ...       1   os/linux/snmp/list-diskio         10                 
+            ...       2   os/linux/snmp/list-diskio-2       4