report section name when asserting bad format

It is good to know what exact layout section is in error when the
conflicting setting assertion is raised.

TEST=tried running with an incorrect json file, observed
     section name reported in the error message.

Change-Id: I4ba7d60913414c8ea681c10410aa9d45da67e9ce
Signed-off-by: Vadim Bendebury <>
Reviewed-by: Daniel Ehrenberg <>
1 file changed