package_manager.py, rootfs.py, sdk.py: add Indexer class
Because the package-index.bb needs to create package indexes outside
do_rootfs environment, move the indexing capability out of
PackageManager class to a smaller Indexer class.
This commit:
* simply moves the indexing functions for ipk/deb with no changes;
* rewrites the RPM indexing function so that it can be easily moved out
of the PackageManager class;
* removes some RPM duplicate code, moves it into a method inside
RpmPM class and changes the RpmPM constructor so that the new method
is effective;
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
