Clear Tables map before execution of plugin - To support multiple plugin executions in pom.xml

Author: ngbsn

src/main/java/io/github/ngbsn/generator/code/JPACodeGenerator.java

@@ -45,6 +45,7 @@ public static void main(final String[] args) throws SQLParsingException, Templat
      */
     public static void generateCode(final String sqlScript, final String packageName) throws IOException, TemplateException, SQLParsingException {
         logger.debug("sql script {}", sqlScript);
+        ModelGenerator.clearTablesMap();
         List<Table> tables = generateModels(sqlScript);
         processTemplate(tables, packageName);
     }