[xmlunit/xmlunit] cc9899: disable cyclonedx plugin when building on Java 7

[Stefan B. <no...@gi...>]

  Branch: refs/heads/main
  Home:   https://github.com/xmlunit/xmlunit
  Commit: cc9899dcd4fd4b54d7f4b9a761b355ba9b3448a2
      https://github.com/xmlunit/xmlunit/commit/cc9899dcd4fd4b54d7f4b9a761b355ba9b3448a2
  Author: Stefan Bodewig <bo...@ap...>
  Date:   2022-12-28 (Wed, 28 Dec 2022)

  Changed paths:
    M pom.xml

  Log Message:
  -----------
  disable cyclonedx plugin when building on Java 7