MCR-2752 create mycore-bom Maven module and add <dependencyManagement> (#1690)
* MCR-2752 create mycore-bom Maven module and add <dependencyManagement> * MCR-2752 sort pom.xml The xml element <build> should be placed before <dependencyManagement> The file /home/runner/work/mycore/mycore/mycore-base/pom.xml is not sorted * MCR-2752 cleanup/format XML / add license header * MCR-2752 add LICENSE.txt * add missing licenseinfo