[MCHANGES-376] Improve log messages on issue management misconfiguration During site generation, the inability to generate a report is logged as WARNING instead of ERROR since it doesn't fail the build. For the announcement generation, an error is still raised. Adding ITs to test for the various errors during announcement generation, and that no errors are raised during site generation. This closes #20.
maven/plugins/trunk/maven-changes-plugin/src/it/announce-generate-inconsistent-issue-management/
maven/plugins/trunk/maven-changes-plugin/src/it/announce-generate-inconsistent-issue-management/invoker.properties