Batch mode (run and stop)

[nsoft]

The original vision for this product was related to a system that was continuously accepting new data, but some use cases involve batch data loads and so a command line option --batchRun should be added to instruct scanners to scan once and then signal completion. When all scanners have completed A) any FTI docs found on startup and; B) one full scan; the JVM should exit with a success status code.