shift sourceSets somewhat (#3320)
shift sourceSets somewhat (#3320)

This way `./gradlew idea` works properly.
GIP-RECIA/cas,frett/cas,rrenomeron/cas,rrenomeron/cas,frett/cas,robertoschwald/cas,GIP-RECIA/cas,GIP-RECIA/cas,frett/cas,GIP-RECIA/cas,robertoschwald/cas,GIP-RECIA/cas,robertoschwald/cas,tduehr/cas,frett/cas,rrenomeron/cas,tduehr/cas,tduehr/cas,rrenomeron/cas,tduehr/cas,robertoschwald/cas,rrenomeron/cas