Generate required ANTLR4 sources only at build time. These generated files should not be part of the repository.
Minor refactoring on JUnit test imports.
Note:
The access modifier of __SYMBOLIC_NAMES in JavaLexer.java file was changed from private to public. As ANTLR4 generates the default JavaLexer.java, I have refactored JavaTokenizer.java and JavaLexerTest.java to use the JavaLexer's Vocabulary attribute to access the symbolic names.
Summary:
Note: