bitbake: cooker: Split configuration parsing code into cookerdata

bitbake: cooker: Split configuration parsing code into cookerdata

In order to have a memory resident bitbake and to allow task execution, we need
to be able to rebuild the base configuration without a cooker. This moves the
code into its own class so it can be built independently.

The interface is less than ideal here but I didn't want to add parsing methods
a subclassed DataSmart, at least until we've experimented further with this code
and are certain that makes sense. At the very least, the methods are ugly and need
cleaning up.  Spliting the code out seems to be the right thing to do though and
should unblock various activities on BitBake so I believe this code is a step in
the right direction.

Based on a patch from Alexandru Damian <alexandru.damian@intel.com>

(Bitbake rev: 22a0b3cf73d2689db0c118b37aa7492632f8b0a7)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>