Added Redfish login after bmc reboot

Change-Id: Ib7fff3a08cba0b58cd3fee10dfeb6b9b17748a1a
Signed-off-by: Anves Kumar rayankula <anvesr77@in.ibm.com>
diff --git a/redfish/managers/test_bmc_network_conf.robot b/redfish/managers/test_bmc_network_conf.robot
index 7aadacc..6b38372 100644
--- a/redfish/managers/test_bmc_network_conf.robot
+++ b/redfish/managers/test_bmc_network_conf.robot
@@ -410,6 +410,7 @@
     Configure Static Name Servers  ${static_name_servers}
     # Reboot BMC and verify persistency.
     OBMC Reboot (off)
+    Redfish.Login
     Verify CLI and Redfish Nameservers
 
 Configure Loopback IP For Gateway
@@ -534,7 +535,7 @@
 
     # Reboot BMC and verify persistency.
     OBMC Reboot (off)
-
+    Redfish.Login
     FOR  ${ip}  IN  @{test_ipv4_addresses}
       Verify IP And Netmask On BMC  ${ip}  ${test_subnet_mask}
     END