Add Multiple Data Source Virtualization Sample

This patch contains a sample example on how to use data virtualization to integrate data from multiple sources into one report. The virtualized sources appear as a standard JDBC source to the JasperReports library. The only difference is that an SQL query can now refer to tables in multiple databases rather than one. For example, SELECT * FROM Database1.Table1 INNER JOIN Database2.Table2 ON ...

The example uses the included hsqldb test database that is made to appear as two distinct sources. There are no modifications to any other part of the source code base necessary besides the sample code itself.

A patch file as well as the complete set of files used is in the attached zip file.