Make install will compile Java packages for two times

Now `make install` will compile Java packages with `mvn` for two times which takes much more time.

Look at the Makefile to understand the 'make install' target and its dependencies. Identify where mvn is invoked and why it runs twice. The fix likely involves adjusting the build order or removing a redundant mvn call. Test by running 'make install' after changes to ensure compilation happens only once.

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