install only deps

would be nice if poldek could install dependendencies, but not actual package.

usecase scenario would be to setup dev environment for application

we have builder -R which would do that for .spec, but not for actual .rpm.
if not too different/difficult implement same for .spec files too so builder -R shell implementation could be replaced.

ps, for yum one can issue:
 yum deplist bind | awk '/provider:/ {print $2}' | sort -u | xargs yum -y install

https://unix.stackexchange.com/a/220531