Update maven-failsafe-plugin version to 3.0.0-M6
Update maven-failsafe-plugin version to 3.0.0-M6

vivekmore/generator-jhipster,jhipster/generator-jhipster,vivekmore/generator-jhipster,vivekmore/generator-jhipster,ctamisier/generator-jhipster,vivekmore/generator-jhipster,liseri/generator-jhipster,liseri/generator-jhipster,atomfrede/generator-jhipster,jhipster/generator-jhipster,atomfrede/generator-jhipster,ctamisier/generator-jhipster,ctamisier/generator-jhipster,ctamisier/generator-jhipster,vivekmore/generator-jhipster,ctamisier/generator-jhipster,atomfrede/generator-jhipster,liseri/generator-jhipster,jhipster/generator-jhipster,atomfrede/generator-jhipster,jhipster/generator-jhipster,liseri/generator-jhipster,liseri/generator-jhipster,jhipster/generator-jhipster,atomfrede/generator-jhipster