====== Maven Essentials ======
  * child pom inherits dependencies from parent-pom.
  * dependencyManagement holds ???
  * show effective pom: mvn help:effective-pom


===== Maven cycle =====

    validate - validate the project is correct and all necessary information is available
    compile - compile the source code of the project
    test - test the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or deployed
    package - take the compiled code and package it in its distributable format, such as a JAR.
    integration-test - process and deploy the package if necessary into an environment where integration tests can be run
    verify - run any checks to verify the package is valid and meets quality criteria
    install - install the package into the local repository, for use as a dependency in other projects locally
    deploy - done in an integration or release environment, copies the final package to the remote repository for sharing with other developers and projects.
    
For ear use
    mvn clean package