Log error when downloading the site participants list in the Site Info tool

Context:

• The Sakai server does not have the DejaVu Sans font installed (free-license font type).
• This Sakai property is enabled: "pdf.default.font=DejaVu Sans".

1. Go to the "Site Info" tool from a site.
2. Click the "Printable Version" link to print the site participants list to PDF.
3. This error is logged:

org.apache.fop.fonts.substitute.FontSubstitutions - Unable to match font substitution for destination qualifier font-family

The problem is in this line:

Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, streamOut);

in the method "SiteInfoToolServlet.generatePDF".

This issue was fixed by this Jira SAM-1674 in Samigo. This fix includes:

• Copy the "DejaVu Sans" font to the samigo resources.
• Register dynamically the directory where the font is.

So the solution to this issue would be the same:

• Copy the "DejaVu Sans" font to the "Site Info" resources.
• Register dynamically the directory where the font is.

A better fix could be:

• Copy the "DejaVu Sans" font to the Kernel resources.
• Register the directory where the font is.

This fix implies that the font would be available to all tools.