There were two problems here:
1. The docs indicated that this should be a dual-BOOM and
single-Rocket config, but the config actually had two Rocket
cores.
2. Since the doc include string was 'DualBoomAndRocket', it was
accidentally matching against the 'DualBoomAndRocketOneHwacha'
section, which comes first in the file.
So, I created a new 'DualLargeBoomAndSingleRocketConfig' config which
only has one Rocket core, and changed the doc include string to
'DualBoomAndSingleRocket'.