lib: intro the jvm module

Signed-off-by: Romain Chanoir <chanoir.romain@courrier.uqam.ca>
tests: intro tests for the jvm module

Signed-off-by: Romain Chanoir <chanoir.romain@courrier.uqam.ca>
tests: modifies tests.sh to execute code using the jvm module

Signed-off-by: Romain Chanoir <chanoir.romain@courrier.uqam.ca>