Added new SNMP test cases
Added new SNMP test cases

Changes:
    - Configure multiple SNMP Managers on BMC and verify 
      persistency on BMC reboot
    - Configure multiple SNMP Managers on BMC and check
      trapy on BMC reboot

Change-Id: I24623bd7de3aa99898a33c63d57eac5c0d33b74e
Signed-off-by: meghagn <077aca49710f803bdf61b2002a4f8477662309a9@ibm.com>

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