Fix network suite setup to take session before continuing

Changes:
       - Added redfish login at the suite setup

Tested:
      - Ran successfully  redfish/managers/test_bmc_network_conf.robot

Change-Id: I9840435c7ddb912dde1a0bbddc0cd9b37a2fc0f1
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/managers/test_bmc_network_conf.robot b/redfish/managers/test_bmc_network_conf.robot
index ae59298..e9d21d1 100644
--- a/redfish/managers/test_bmc_network_conf.robot
+++ b/redfish/managers/test_bmc_network_conf.robot
@@ -781,6 +781,7 @@
     #   - Get DHCP IPv4 settings - ip address, gateway, subnetmask
     #   - And set the same as static IP address
 
+    Redfish.Login
     ${DHCPEnabled}=  Get IPv4 DHCP Enabled Status
     Set Suite Variable  ${DHCPEnabled}
 
@@ -958,4 +959,4 @@
         ${gateway}=  Set Variable  ${resp['Gateway']}
         ${subnetmask}=  Set Variable  ${resp['SubnetMask']}
         Return From Keyword  ${ip_addr}  ${gateway}  ${subnetmask}
-    END
\ No newline at end of file
+    END