Closes #3027 and updates install4j to v7
Closes #3027 and updates install4j to v7

zellerdev/jabref,oscargus/jabref,shitikanth/jabref,sauliusg/jabref,oscargus/jabref,shitikanth/jabref,shitikanth/jabref,shitikanth/jabref,oscargus/jabref,JabRef/jabref,oscargus/jabref,oscargus/jabref,zellerdev/jabref,sauliusg/jabref,tobiasdiez/jabref,sauliusg/jabref,tobiasdiez/jabref,Siedlerchr/jabref,JabRef/jabref,tobiasdiez/jabref,zellerdev/jabref,shitikanth/jabref,JabRef/jabref,JabRef/jabref,sauliusg/jabref,zellerdev/jabref,Siedlerchr/jabref,zellerdev/jabref,tobiasdiez/jabref,Siedlerchr/jabref,Siedlerchr/jabref