Enable test cases for dump function of OpenBMC.

This change includes:
    - Added keyword to create, check and delete bmc dump.
    - Added below test cases:
        1. Verify User Initiated Dump
        2. Delete User Initiated Dump And Verify
        3. Verify User Initiated Dump Size
        4. Create Two User Initiated Dump And Delete One

Resolves openbmc/openbmc-test-automation#232

Change-Id: Icffce866acbf630a6f28dd5d1cf5583bba267cd3
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
2 files changed