When used, this parameter will display a field at build-time so that the
user is able to select the ClearCase UCM baseline from which to download
the content to be worked with by this project.
To use this parameter, you MUST also set the SCM to be the ClearCase UCM
baseline one, otherwise the build will fail.
The name of the selected ClearCase UCM baseline is available through the
CLEARCASE_BASELINE
environment variable.