Test documentation typo fixes using codespell tool

Changes:
      - Fix typo in code documentation and test name

Tested: - Using codespell tool.

Change-Id: Ia1b65bddc01a4b1c103af9f2094d87da11c88953
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/managers/test_bmc_ipv6.robot b/redfish/managers/test_bmc_ipv6.robot
index 913ace8..55c07c7 100644
--- a/redfish/managers/test_bmc_ipv6.robot
+++ b/redfish/managers/test_bmc_ipv6.robot
@@ -17,7 +17,7 @@
 ${test_ipv6_addr}          2001:db8:3333:4444:5555:6666:7777:8888
 ${test_ipv6_invalid_addr}  2001:db8:3333:4444:5555:6666:7777:JJKK
 
-# Valid prefix length is a intiger ranges from 1 to 128.
+# Valid prefix length is a integer ranges from 1 to 128.
 ${test_prefix_lenght}     64
 
 
diff --git a/redfish/service_root/test_service_root.robot b/redfish/service_root/test_service_root.robot
index f5c03ce..573cca3 100644
--- a/redfish/service_root/test_service_root.robot
+++ b/redfish/service_root/test_service_root.robot
@@ -131,7 +131,7 @@
 *** Keywords ***
 
 GET And Verify Redfish Response
-    [Documentation]  GET given resource and verfiy response.
+    [Documentation]  GET given resource and verify response.
     [Arguments]  ${valid_status_codes}  ${resource_path}
 
     # Description of argument(s):
diff --git a/redfish/update_service/test_firmware_inventory.robot b/redfish/update_service/test_firmware_inventory.robot
index 2c25fbe..c8fabe6 100644
--- a/redfish/update_service/test_firmware_inventory.robot
+++ b/redfish/update_service/test_firmware_inventory.robot
@@ -322,7 +322,7 @@
     [Arguments]  ${image}
 
     # Description of argument(s):
-    # image           Fucntional Image or Backup Image
+    # image           Functional Image or Backup Image
 
     Verify Firmware Version Same In Firmware Inventory And Managers