[MNG-2477] rewrite the POM on deployment without elements that old versions of Maven won't understand. Needs improvement, but this revision would be useful for other elements in the interim while we wait for better repository metadata
maven/components/branches/MNG-2477/maven-project/src/main/java/org/apache/maven/project/artifact/ModelDowngrade.java
maven/core-integration-testing/branches/MNG-2477/core-integration-tests/src/test/resources/mng-2477-repository-security/