Sleep for a minute once BMC reaches standby

Network interface dropping once we get to BMC_READY, please refer
openbmc/openbmc/#815. As a quick hack we are sleeping for a minute
to mitigate the issue as per observation during the code update.

Change-Id: I8a6a6bdabafc3309f045fd6eaa4bb84d09ee1507
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/extended/code_update/update_bmc.robot b/extended/code_update/update_bmc.robot
index 837980f..9336ef38 100644
--- a/extended/code_update/update_bmc.robot
+++ b/extended/code_update/update_bmc.robot
@@ -54,6 +54,9 @@
     Wait Until Keyword Succeeds
     ...    10 min   10 sec   Verify BMC State   ${states}
 
+    # TODO: openbmc/openbmc#815
+    Sleep  1 min
+
     Preserve BMC Network Setting
     SCP Tar Image File to BMC   ${FILE_PATH}