patched lims_server.pl to always set REPORT_HTML env param so report rendered as HTML not PDF since lims_server runs as single process mode so hangs if img tag called by tmpl rendering in memory
fixed failure to load images when report rendered as PDF - required CGISESSID param passing, either in url or cookie, HTML::HTMLDOC doesn't support cookie param (though HTMLDOC binary does), so set CGISESSID as url 'get' param
