update smart_proxy_salt to 0.0.2

```/etc/salt/foreman.yaml.example``` and ```/usr/bin/foreman-node``` are requirements by @stbenjam

Actually, this isn't required, %gem_install correctly sets it:

+ gem install -V --local --install-dir ./usr/lib/ruby/gems/1.8 --bindir ./usr/bin --force /builddir/build/SOURCES/smart_proxy_salt-0.0.2.gem

(and in any case, would be `.%{_bindir}` so it's installed in the build env, not the root /usr/bin)