[Hawkular-dev] Checking and fixing license headers

Hi *, This [1] is is the second version of the PR. It solves the problem raised by tsegismont (whose validity was confimed by RH Legal) that in the license headers it is necessary to The present solution uses a place holder ${license.copyrightYears} in the template [2] that is evaluated by the license plugin separately for every source file, based on its git history. My 150116-license [3] branch in metrics shows how to use it. There are two use cases: (1) Fix or add the license headers in all project's files through issuing mvn license:format Note that the commit [4] is a result of running mvn license:format in the root directory of metrics (2) Check the presence of the headers and their correctness through mvn license:check Note that license:check is bound to the validation phase [5] Is [1] OK to be merged to hawkular-build-tools? Thanks, Peter [1] https://github.com/hawkular/hawkular-build-tools/pull/1 [2] https://github.com/ppalaga/hawkular-build-tools/blob/150114-license/src/m... [3] https://github.com/ppalaga/rhq-metrics/tree/150116-license [4] https://github.com/ppalaga/rhq-metrics/commit/4fe8a6faed2bf70deb6e9cf8293... [5] https://github.com/ppalaga/rhq-metrics/blob/150116-license/pom.xml#L491