Make build work with Maven 3.0

More specifically, is fails on the cargo-core-api-util project:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.3:checkstyle (checkstyle) on project cargo-core-api-util: An error has occurred in Checkstyle report generation. NullPointerException -> [Help 1]

I've tested with m-checkstyle-p v2.4 and v2.5 with different errors.

There is also some issue with the build of the Maven 1 plugin.

I believe Ali has done several changes to the build, so it is now possible to build with Maven 3.0.
However, there are possibly some things to verify before closing this issue.

The checkstyle plugin upgrade (in order to ensure compatibility with Maven3) has been done as part of CARGO-881.

Also, the Codehaus CI has a new plan with Maven3 (under JDK6 exclusively for now). See http://bamboo.ci.codehaus.org/browse/CARGO-TRUNKM3JDK16

Adding dependency on CARGO-793 as Maven3 does not support Maven1 repositories, hence cannot build Maven1 plugins.

Note to self: Don't forget to check the site stuff.

Added special profile for managing different version of maven-site-plugin when building with Maven 3 (applied in r2754 on trunk.). Tested site-deploy and it looks good. However, I do get some exceptions during the generation of the Dependencies report (the build doesn't fail though):

[INFO] Generating "Dependencies" report — maven-project-info-reports-plugin:2.3.1
[ERROR] IOException: Failed to open file /Users/anders/dev/workspace/cargo-trunks/core/api/container/target/classes : error in opening zip file
java.util.zip.ZipException: Failed to open file /Users/anders/dev/workspace/cargo-trunks/core/api/container/target/classes : error in opening zip file
at org.apache.maven.shared.jar.JarAnalyzer.<init>(JarAnalyzer.java:109)
at org.apache.maven.report.projectinfo.dependencies.Dependencies.getJarDependencyDetails(Dependencies.java:273)
at org.apache.maven.report.projectinfo.dependencies.renderer.DependenciesRenderer.hasSealed(DependenciesRenderer.java:1374)
at org.apache.maven.report.projectinfo.dependencies.renderer.DependenciesRenderer.renderSectionDependencyFileDetails(DependenciesRenderer.java:544)
at org.apache.maven.report.projectinfo.dependencies.renderer.DependenciesRenderer.renderBody(DependenciesRenderer.java:271)
but the it doesn't seem to affect the results (the build succeeds and at least the javadoc looks good):

We don't use that report so I haven't investigated.

Closing as everything should be fixed by now for building and releasing with Maven 3.