Refactor to use Maven for building and publishing Java packages

Author: adamretter

.gitignore

@@ -61,11 +61,9 @@ io_tracer_parser
 .vscode
 .clangd
 
-java/out
+java/pom.xml
 java/target
-java/test-libs
 java/*.log
-java/include/org_rocksdb_*.h
 
 .idea/
 *.iml
@@ -75,8 +73,6 @@ rocksdb.h
 unity.cc
 java/crossbuild/.vagrant
 .vagrant/
-java/**/*.asc
-java/javadoc
 
 scan_build_report/
 t