Fix inventory test cases

Fixes:
   - Remove "Manufacturer" checking from test.
   - Update with new xyz "Is OS Booted" keyword.

Resolves openbmc/openbmc-test-automation#882

Change-Id: Ic8bde8e18bd59d6940c1d4136ddb2efe89318883
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
1 file changed