Update TestPdfLayoutMgr.java

I learned that the first 2 of the 3 verses of the German national anthem are obsolete.  I'm not trying to promote any views of different countries here, just testing various character sets.  Thank you, Tilman Hausherr for your tip:
https://issues.apache.org/jira/browse/PDFBOX-1527?focusedCommentId=14117081&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14117081