New argument -genapi [19958]

[richiware]

Depends on:

• eprosima/idl-parser#105

List of changes:

• Created IDL-Parser grammar templates with default value in eprosima.stg file.
• Removed from STG files all IDL-Parser grammar templates that has the default value. Now eprosima.stg ones will be used.
• Update IDL-Parser submodule with the needed changes (eprosima/idl-parser#105)
• Move creation of @Key annotation from fastddsgen.java to Context.
• Added -genapi argument to the program.
• Override Context addModule() function to change modules if -genapi argument is being used.
• Override Context getTypeCode() function to change modules if -genapi argument is being used.