add license file to jar

pom.xml

@@ -148,6 +148,14 @@
         <directory>${project.basedir}/src/main/resources</directory>
         <filtering>true</filtering>
       </resource>
+
+      <resource>
+        <directory>.</directory>
+        <targetPath>META-INF</targetPath>
+        <includes>
+          <include>LICENSE.txt</include>
+        </includes>
+      </resource>
     </resources>
 
     <pluginManagement>