PDFBOX-2430: switch to use the non-sequential parser

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1640619 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-2430: removed command line parser switch from merger tool, switch to use the non-sequential parser

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1640620 13f79535-47bb-0310-9956-ffa450edef68