No keyword with name 'Verify IPv6 And PrefixLength On BMC' found

Changes:
    - Correct the keyword called in the test suite

Tested:
    - NA

Change-Id: I001761d1615331233cf82403a49ac5de124a4002
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 55c07c7..edabf98 100644
--- a/redfish/managers/test_bmc_ipv6.robot
+++ b/redfish/managers/test_bmc_ipv6.robot
@@ -55,7 +55,7 @@
     [Tags]  Verify_All_Configured_IPv6_And_PrefixLength_On_BMC
 
     FOR  ${ipv6_network_configuration}  IN  @{ipv6_network_configurations}
-      Verify IPv6 And PrefixLength On BMC  ${ipv6_network_configuration['Address']}
+      Verify IPv6 And PrefixLength  ${ipv6_network_configuration['Address']}
       ...  ${ipv6_network_configuration['PrefixLength']}
     END