new additions to ngs_myeloid_screening.pl

bugfixes: don't skip request if validation fails for genomics.t; can't use content_contains on string with line-break

bugfixes a) auto-vivification in genomics_xml.pl, b) auto-vivification didn't cause validation failure in xml_validate.pl as params validated after xml created - changed to same order as in genomics_xml.pl; applied same fix as genomics_xml.pl to return value from validate_params() in xml_validate.pl

hilis3 conversion scripts for YHHN