meta-ibm: romulus: new YAML dependency scheme

A prior patch added a new recipe romulus-yaml-config to provide all the
YAML configuration for Romulus systems.  This patch switches the layer
to that recipe by setting EXTRA_OECONF and DEPENDS as appropriate in the
required bbappends.

With this switch, a number of recipes and their provided YAML are now
dead metadata, so remove those.

Change-Id: If5e480eb1477d6847051a3fa04c889668a86158e
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
15 files changed