copy the code from dashboard src/main/java
modified app.java
modified some files
add resources
add tests
commit to reverse
Revert "commit to reverse "

This reverts commit 384b9979b9e8fe71b0c0aa9e0659087386754c0c.
Revert "Revert "commit to reverse ""

This reverts commit c5b8d386383c664f8fd6bd6deca6706a10a32be2.
Revert b9ab6e7..8a47d84

This rolls back to commit b9ab6e7b49da477b097f1df60c7351422798bcc5.
change the package name in context files
remove redis.xml
remove some packages in test-context
remove some unused code
Revert 31df6bb..7114e5f

This rolls back to commit 31df6bbdd62ab4ef2e456b022ba9685cb88028a2.
remove unused codes
make dashboard-dw depends on dashboard
add App.java
add app.java that run the main loop
add updateService
add scheduler and worker