Remove RPM requirements
Remove RPM requirements

Fixes #151
Ref #144, #62

We are removing RPM requirements for JDK because it's not possible to reliably specify JDK 1.8 across different distros.

sbt/sbt,xuwei-k/xsbt,sbt/sbt,sbt/sbt,mdedetrich/sbt,mdedetrich/sbt,mdedetrich/sbt,sbt/sbt,mdedetrich/sbt,xuwei-k/xsbt,sbt/sbt,sbt/sbt-launcher-package,mdedetrich/sbt,sbt/sbt,mdedetrich/sbt,xuwei-k/xsbt,mdedetrich/sbt,sbt/sbt,xuwei-k/xsbt,sbt/sbt-launcher-package,xuwei-k/xsbt