Replaced REST with Redfish for IPMI test cases

IPMI test cases modified:
   - Verify Host PowerOff Via IPMI
   - Verify Host PowerOn Via IPMI

Change-Id: I6a69b26880a34011e64373bd1dd66176272436c0
Signed-off-by: Sushma M M <sushmm99@in.ibm.com>
diff --git a/lib/ipmi_client.robot b/lib/ipmi_client.robot
index 20618d5..4484f61 100755
--- a/lib/ipmi_client.robot
+++ b/lib/ipmi_client.robot
@@ -425,4 +425,4 @@
     FOR  ${user_record}  IN  @{non_root_user_info}
         Run IPMI Standard Command   user set name ${user_record['user_id']} ""
         Sleep  5s
-    END
+    END
\ No newline at end of file