Running "mvn clean" on Jenkins server after successful build

[Martin Desruisseaux]

Hello all

The Jenkins build on the "solaris1" node is failing since a few days 
because out of disk space on that node. In order to gives Jenkins a 
chance, I'm tempted to add a "mvn clean" step after successful builds. 
On my local machine, disk usage after "mvn install site" is 158Mb, while 
only 66Mb after clean. This is only 42% on the former disk usage. If we 
verify that it doesn't impact the web site publication and the artifacts 
deployment, maybe we could suggest on bui...@apache.org to encourage 
other Maven projects to do the same?

    Martin