JHipster-loaded project integration. 

JHipster loaded integration. The following modification has been done:
   - Migrate all reload classes to the jhipster-loaded project. Remove the reload folder
   - Remove springloaded.jar file - JHipster-loaded project will generate a new springloaded-jhispter.jar that integrate all classes from springloaded.jar file and the jhipster instrument classes. This new jar will be used instead. Now the JVM opts will be set to "-javaagent:spring_loaded/springloaded-jhipster.jar -noverify -Dspringloaded=plugins=com.jhipster.loaded.JHipsterLoadtimeInstrumentationPlugin". Keep the same config for any projects.
    - Add a new configuration in the hotReload section
    - JHipster reload is not auto-configured. See META-INF/spring.factories in the jhipster-loaded project
    - Add a new branch named mvn-repo in the jhipster-loaded to be able to load the library. This will be removed once the maven repository will be migrated to another repo