Revert "XWIKI-6948: Upgrade to commons-lang 3.0.1"

...va/org/xwiki/rendering/internal/macro/code/CodeMacro.java

...rnal/parser/pygments/BlocksGeneratorPygmentsListener.java

...ki/rendering/internal/parser/pygments/PygmentsParser.java

...dering/internal/macro/container/ColumnsLayoutManager.java

...iki/rendering/macro/container/AbstractContainerMacro.java

...ki/rendering/internal/macro/dashboard/DashboardMacro.java

...ndering/internal/macro/dashboard/DefaultGadgetSource.java

.../rendering/internal/macro/rss/DefaultRomeFeedFactory.java

...java/org/xwiki/rendering/internal/macro/rss/RssMacro.java

...ava/org/xwiki/rendering/macro/rss/RssMacroParameters.java

...nal/macro/script/DefaultAttachmentClassLoaderFactory.java

...ternal/macro/script/ScriptClassLoaderHandlerListener.java

...iki/rendering/macro/script/AbstractJSR223ScriptMacro.java

...org/xwiki/rendering/macro/script/AbstractScriptMacro.java

.../rendering/internal/macro/useravatar/UserAvatarMacro.java

...wiki/rendering/internal/macro/velocity/VelocityMacro.java

.../rendering/internal/renderer/XWikiLinkLabelGenerator.java

...ava/org/xwiki/rendering/internal/wiki/XWikiWikiModel.java