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.
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