Minor changes to fix Patch request in PLDM BIOS test
Minor changes to fix Patch request in PLDM BIOS test

Changes:
    - Added code to take session

Tested:
   - Ran test suite pldm/test_pldm_bios.robot

Change-Id: Icd4f2a78ff271d3530a671140d3d3cf442a5ed18
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation