Fixed problem with CSS not being used in printing.

* The problem is that in last version of CutyCapt the parameter name has changed
  from "user-styles" to "user-style-path".

FEA: ItEr68S08PrintingSupport

navalplanner-webapp/src/main/java/org/navalplanner/web/print/CutyPrint.java

@@ -200,7 +200,7 @@ public class CutyPrint {
                 minWidthForTaskNameColumn);
 
         // Relative user styles
-        captureString += " --user-styles=" + generatedCSSFile;
+        captureString += " --user-style-path=" + generatedCSSFile;
 
         // Destination complete absolute path
         captureString += " --out=" + absolutePath + filename;