Make CleaningFilter (HTMLFilter) interface in xwiki-xml module reusable in other components

CleaningFilter interface in xwiki-core-xml module can be reused in other components like officeimporter. But there are several changes to be done in order to accommodate this:

• Change CleaningFilter interface to HTMLFilter (name makes more sense)
• Change the filter(Document doc) method signature in CleaningFilter to filter(Document document, Map<String, String> cleaningParams) so that additional parameters to filters can be passed.
• Make other necessary refactorings required