The wagon will now refresh the meta-data for an artifact from the server
prior to updating it with hash values.  This prevents the wagon from
clobbering changes made to the artifact on the server.

https://issues.jboss.org/browse/SRAMP-226
Merge pull request #307 from EricWittmann/sramp-226

(sramp-226) Wagon doesn't refresh artifact meta-data prior to pushing changes to server