Added test cases related to BMC dump delete

Test cases added:
    - Delete User Initiated BMC Dump And Verify
    - Delete All User Initiated BMC Dumps And Verify

Change-Id: If0a6004b2905318a2070ceb57709413e222bef0e
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/lib/dump_utils.robot b/lib/dump_utils.robot
index 233e782..cb88423 100644
--- a/lib/dump_utils.robot
+++ b/lib/dump_utils.robot
@@ -140,6 +140,16 @@
     END
 
 
+Redfish Delete BMC Dump
+    [Documentation]  Deletes a given BMC dump via Redfish..
+    [Arguments]  ${dump_id}
+
+    # Description of Argument(s):
+    # dump_id  An integer value that identifies a particular dump (e.g. 1, 3).
+
+    Redfish.Delete  /redfish/v1/Managers/bmc/LogServices/Dump/Entries/${dump_id}
+
+
 Redfish Delete All BMC Dumps
     [Documentation]  Delete all BMC dumps via Redfish.