[MPIR-288] Add a skipEmptyReport option

Generally, report generation is now skipped by defualt if the appropriate section(s) of the POM are not filled.

* Resolved a few TODOs
* Added a few TODOs to which need to be resolved before MPIR-288 can be applied to all reports
* Adaptes minimal-pom IT for new option

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1643888 13f79535-47bb-0310-9956-ffa450edef68
[MPIR-288] Add a skipEmptyReport option

* Resolved a few TODOs
* Adapted full-/minimal-pom IT for fixed reports

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1643913 13f79535-47bb-0310-9956-ffa450edef68
Accidentially removed plugin

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1643916 13f79535-47bb-0310-9956-ffa450edef68
Improve TODO descriptions

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1643936 13f79535-47bb-0310-9956-ffa450edef68
Added localization strings for verbatim copy of a URL-based license

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1643943 13f79535-47bb-0310-9956-ffa450edef68