Java 9 fixes

[nhojpatrick]

maven-jar-plugin and maven-javadoc-plugin require org.codehaus.plexus:plexus-archiver:3.0.3-SNAPSHOT

plexus-archiver has had a critical change due to Java 9 changes to the java.version property

see codehaus-plexus/plexus-archiver#12 for more information about the fix

this fix also unblocks building both junit and testng at a minimum, plus potentially any other maven project using either of these two plugins

Linked to;
https://issues.apache.org/jira/browse/MJAR-206
https://issues.apache.org/jira/browse/MJAVADOC-443
junit-team/junit4#1233
testng-team/testng#938

[Tibor17]

Sorry @nhojpatrick but SNAPSHOT Versions cannot be accepted by maven-release-plugin.
IMO those are not so urgent fixes at the moment and must wait for real release versions.
For instance here you can see our Release Notes of jar plugin
https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12317526&version=12334171
and one can see that we are missing the last issue but not the least to fix
https://issues.apache.org/jira/browse/MJAR/fixforversion/12334171/?selectedTab=com.atlassian.jira.jira-projects-plugin:version-summary-panel
As you can see in the Maven mailinglist we are talking with Oracle regarding Jdk9 and we are invited in conferences, so I guess the guys will get more fixes to Maven. We are for instance talking about whether modulepath would be apart of classpath, changing Maven API, Maven 4, etc.

[olamy]

some conflicts BTW I think it's fixed now?