Specify where Jenkins would store records of the past builds.
    This value can include the following variables.
    
        - ${JENKINS_HOME} — Jenkins home directory.
        
- ${ITEM_ROOTDIR} — Root directory of a job for which the default workspace is allocated.
        
- ${ITEM_FULL_NAME} — '/'-separated job name, like "foo/bar".
    
    Changing this value allows you to put build records on a bigger but slow disk,
    while keeping JENKINS_HOME on highly available backed up drive, for example.
    Default value is ${ITEM_ROOTDIR}/builds.