Update plugin versions, so build works with JDK 17

[DaGeRe]

Currently, building with JDK 17 results in the following error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project kieker.rabbitmq: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.2:war failed: Unable to load the mojo 'war' in the plugin 'org.apache.maven.plugins:maven-war-plugin:2.2' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: Cannot access defaults field of Properties
[ERROR] -----------------------------------------------------
[ERROR] realm =    plugin>org.apache.maven.plugins:maven-war-plugin:2.2
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/home/reichelt/.m2/repository/org/apache/maven/plugins/maven-war-plugin/2.2/maven-war-plugin-2.2.jar
[ERROR] urls[1] = file:/home/reichelt/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.6/maven-reporting-api-2.0.6.jar
[ERROR] urls[2] = file:/home/reichelt/.m2/repository/org/apache/maven/doxia/doxia-sink-api/1.0-alpha-7/doxia-sink-api-1.0-alpha-7.jar
[ERROR] urls[3] = file:/home/reichelt/.m2/repository/commons-cli/commons-cli/1.0/commons-cli-1.0.jar
[ERROR] urls[4] = file:/home/reichelt/.m2/repository/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-4/plexus-interactivity-api-1.0-alpha-4.jar
[ERROR] urls[5] = file:/home/reichelt/.m2/repository/org/apache/maven/maven-archiver/2.5/maven-archiver-2.5.jar
[ERROR] urls[6] = file:/home/reichelt/.m2/repository/org/codehaus/plexus/plexus-io/2.0.2/plexus-io-2.0.2.jar
[ERROR] urls[7] = file:/home/reichelt/.m2/repository/org/codehaus/plexus/plexus-archiver/2.1/plexus-archiver-2.1.jar
[ERROR] urls[8] = file:/home/reichelt/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.15/plexus-interpolation-1.15.jar
[ERROR] urls[9] = file:/home/reichelt/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
[ERROR] urls[10] = file:/home/reichelt/.m2/repository/com/thoughtworks/xstream/xstream/1.3.1/xstream-1.3.1.jar
[ERROR] urls[11] = file:/home/reichelt/.m2/repository/xpp3/xpp3_min/1.1.4c/xpp3_min-1.1.4c.jar
[ERROR] urls[12] = file:/home/reichelt/.m2/repository/org/codehaus/plexus/plexus-utils/3.0/plexus-utils-3.0.jar
[ERROR] urls[13] = file:/home/reichelt/.m2/repository/org/apache/maven/shared/maven-filtering/1.0-beta-2/maven-filtering-1.0-beta-2.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
[ERROR] 
[ERROR] -----------------------------------------------------

This can be fixed by updating the plugin versions.

To continuously test this, I'd recommend to additionally test both JDKs (and soon JDK 21, as its going to be the next LTS release) in the GH Action (like https://github.com/DaGeRe/KoPeMe/blob/26200eb370afb22c5717f9ce6c209af8a78ab630/.github/workflows/mavenForPR.yml#L17).