title: Upgrading the commons-lang-2.6.jar throws NoClassDefFoundError
body: <p><a href="https://i.stack.imgur.com/RQCFU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RQCFU.png" alt="enter image description here"></a>I have upgraded the version of commons-lang from 'commons-lang-2.6.jar' to 'commons-lang3-3.2.1.jar'. After deployment when I goes to test particular link it throws "SEVERE: >>java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils</p>
  
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      <p>java.lang.ClassNotFoundException: org.apache.commons.lang.StringUtils".                                       I have upgraded the Jar for Swagger compatability. I am using ant build, all these dependencies are declared in 'build.xml' and libraries are added in lib folder.</p>
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