python-smartpm: add ignore-recommends package flag

python-smartpm: add ignore-recommends package flag

Adds support for a flag that is saved into Smart's configuration against
a package that says it should not be installed if it is only recommended
by a package being installed rather than required. This will enable us
to add BAD_RECOMMENDATIONS support for RPM.

(From OE-Core rev: 70517fca31261c1ca4b15bb38f8960b2f95993ba)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>