Canonicalize Property Names/Behavior in SVN Connector

The SVN connector assigns the same semantics to setDirectoryOfDefaultWorkspace that other connectors assign to setDefaultWorkspaceName. It also requires a full URL for each workspace name (equivalent to the original method of naming workspaces in the FS connector, but unlike the other connectors and the new method of naming workspaces in the FS connector). For consistency, it would be nice if these methods used the canonical names and behavior.