Changed the sherpa2.spec and toolfile to implement the newest sherpa ver...

Update the Sherpa2 toolfile to the new version 2.1.0 of Sherpa
Added a new patchfile for the LHAPDF issue and added fastjet support in the configure step
Keep in mind, that either sherpa or sherpa2 has to be chosen, both do not work at the same time since the libraries & variables have the same name.