Build succeeded in Jenkins: Maven TLP » maven » MNG-6878 #2

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See https://builds.apache.org/job/maven-box/job/maven/job/MNG-6878/2/

Changes:

* Java 14 released, so Java 13 EOL. Include Java 15-ea
* Adjust JDKs in Jenkinsfile
* [MNG-6878] Bump guice from 4.2.2 to 4.2.3

All tests passed