openSUSE package query  and install enhancements (#729)
openSUSE package query  and install enhancements (#729)

* Enable PIP installer for openSUSE

* openSUSE package detection with RPM capabilities

Packages sometimes get renamed and their old name is kept as an rpm capability (like an alias), so the additional flag `--whatprovides` is passed to the `rpm` query.
ros-infrastructure/rosdep,ros-infrastructure/rosdep