Replace `org.apache.commons.lang` library by `org.apache.commons.lang3`

Remove use of org.apache.commons.lang and switch to org.apache.commons.lang3.

Currently we use 3.1.0. Upgrading to 3.6 or higher (latest is 3.12) deprecates StringEscapeUtils https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/StringEscapeUtils.html and recommends switching to commons.text for that.