Workspace name formatter

Jenklin slave nodes must each use a unique Perforce workspace. The format string configures the workspace name by substituting the following tokens: (at least one token must be used)

${node}
The name given to the slave Jenkins node. (Caution this might not be unique).
${hostname}
The hostname for the slave Jenkins node.
${project}
The name of the Jenkins build Job. (Caution this is not unique for slaves).
${hash}
Unique hash code of the Jenkins node.