Xerces version check makes an issue while building

[zarda]

In the Code/Makefile.txt, the Xerces version check is too old to pass.
The XERCES_VERSION need to be free or change to a higher version number, maybe 3.5.

---

Xerces

casa_find( XERCES
VERSION 2.7.0
PREFIX_HINTS ${XERCES_ROOT_DIR}
INCLUDES xercesc/util/XercesVersion.hpp
LIBS xerces-c
CPP_VERSION XERCES_FULLVERSIONDOT
RUN_VERSION "gXercesMajVersion << '.' << gXercesMinVersion << '.' << gXercesRevision"
)
if( XERCES_VERSION VERSION_EQUAL 3.2 OR
XERCES_VERSION VERSION_GREATER 3.2 )
message( FATAL_ERROR "Xerces version (${XERCES_VERSION}) is too recent! Must be earlier than 3.0." )
endif()