Raise Java Level in GenModels to 7.0
This should get rid of the following warning in the Eclipse error log:
!ENTRY org.eclipse.emf.codegen 2 0 2018-04-09 19:14:26.711
!MESSAGE A problem was detected while parsing a Java file
Line 323: '<>' operator is not allowed for source level below 1.7/**
* (c) 2017 fortiss GmbH. GENERATED CODE: Do not edit, see Ecore metamodel instead!
Likely source of error:
return new org.eclipse.emf.common.util.BasicEList<>();
(from redmine: issue id 3376, created on 2018-04-09, closed on 2018-05-03)