tests: Fix up a couple of tests to match current results.

Signed-off-by: Ben Pfaff <blp@nicira.com>
odp-util: Fix BOS checks in parse_l2_5_onward().

The check for the innermost BOS should only happen for flows, not for
masks.  This fixes a test failure.

Also, check that BOS=0 in labels other than the innermost.

Signed-off-by: Ben Pfaff <blp@nicira.com>