Handle of licensed fonts

Description

If the user try to upload licensed font, Content Exporter can not export it.
The problem is, that CEX doesn't show a correct error message about it.

The exception

com.lowagie.text.DocumentException: C:\Munka\CEX\cloud-content-exporter\.\tmp\87eb14d41eeeac0bd7fe0c62ece05134bbf1ee8059b6e3e701d7f4a7799506dc_DS-DIGI.TTF cannot be embedded due to licensing restrictions.
at com.lowagie.text.pdf.TrueTypeFontUnicode.<init>(Unknown Source)
at com.lowagie.text.pdf.BaseFont.createFont(Unknown Source)
at com.lowagie.text.pdf.BaseFont.createFont(Unknown Source)
at com.lowagie.text.pdf.BaseFont.createFont(Unknown Source)
at org.xhtmlrenderer.pdf.ITextFontResolver.addFont(ITextFontResolver.java:201)

Environment

None

Preliminary Test Cases

None

Assignee

András Németh

Reporter

András Németh

Labels

None

Access to limited visibility issues

None

Product platform

Server
Data Center
Cloud

Ready for Development

None

Target version

None

Time tracking

0m

Time remaining

4h

Priority

Minor