[maven] build command

• mvn [clean] package
• mvn -o [clean] package
• Offline Build.
• mvn -Dbuild.stage=staging clean package
• mvn -Dmaven.test.skip=false package
• enable the unit testing.
• mvn -Dmaven.test.skip=false test
• testing only.
• mvn -Dmaven.test.skip=true -Dbuild.stage=staging clean package