Add failure messages for clarity in test suite setup
Add failure messages for clarity in test suite setup

Before fix:
Parent suite setup failed:
'' should not be empty.

After fix:
Parent suite setup failed:
Please provide required paramter OS_HOST

Change-Id: I25c409978806b1d97a8223edf1ba2526f5be31aa
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

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