RDBMS tests and init of the new module

The tests to check some Expressions to SQL statement conversion and started the new module which will provide a tool to generate the RDBMS module configuration by reverse engineering  
It is already processed before that, the following method is responsible for it -> https://github.com/luan-cestari/lightblue-rdbms/blob/PR_PLUS_RDBMS_TOOLS/metadata/src/main/java/com/redhat/lightblue/metadata/rdbms/converter/Translator.java#L518-L529