Remove javassist dependency

pom.xml

       <version>1.5.6</version>
     </dependency>
     <dependency>
-      <groupId>javassist</groupId>
-      <artifactId>javassist</artifactId>
-      <version>3.8.0.GA</version>
-    </dependency>
-    <dependency>
       <groupId>commons-lang</groupId>
       <artifactId>commons-lang</artifactId>
       <version>2.3</version>