D4ParserSax2 removes newline chars from element content

The D4ParserSax2.cc code reads input line by line and in doing so removes the newline or cr/lf characters from the input stream. When dealing with XML tags this is not an issue but element element text content should not have the newline or cr/lf characters removed.

This patch may need to be applied to the DmrppParserSax2 code in bes/modules/dmrpp_module/DmrppParserSax2