FQA-2003: Update javadoc
FQA-1967: 4.1.x/FNC/PLF/Unified Search/File Search and Page
FQA-1971: FNC/PLF/Unified Search/Search Results
FQA-1966: 4.1.x/FNC/PLF/Unified Search/Document Search
FQA-1968: FNC/PLF/Unified Search/Event Search
FQA-1970: FNC/PLF/Unified Search/Search Engine and Space Search