NMS-5182: Remove unused files.
NMS-5182: Update to latest JasperReports Library version.
NMS-5182: Set target version to Java 6 (was Java 5).
Merge pull request #2 from OpenNMS/jira/NMS-5182

NMS-5182: Fix MavenJavacCompiler imcompatibility to JasperReports Library 5.6.1