use sshfs to speed up publishing process

Currently, publishing from /snapshots to /staging and from /staging to /development requires that we fetch several GBs of data from filemgmt.jboss.org to a temp folder, then push those bits to a new folder on filemgmt.jboss.org.

If we could simply copy bits over sshfs, the process might be a lot faster than these times:

JBT coretests 1.1G: 59m20
JBT core 1.2G: 64m23
devstudio (copy from filemgmt to filemgmt) 2.4G: 2h13
devstudio (copy from local to www.qa) 3.1G: 6mins(?)

To make this work, however, we need more slaves to have sshfs installed. Currently, it appears that only dev01 [1] is so equipped. And that slave, currently, has a build queue more than 170 jobs long, making it impractical to even TEST publishing over sshfs.

[1] https://jenkins.mw.lab.eng.bos.redhat.com/hudson/computer/dev01-rhel5-x86/