P250 Trunc64 tests

• This is a test task to investigate/validate data taken with tracker readout configured for preserving more strips.
• This is a clone of P202-ROOT with a few jobOpt changes, and reading a special, small block of runs.
• Because the same group of runs is being reprocessed multiple times with different configurations, the dataCatalog entries will, in general, be of limited use as it will point only to data corresponding to the more recent of the configurations.
• Selected data from this task are stored in /nfs/farm/g/glast/u37/Trunc64_tests/P250-ROOT/
• See this JIRA for details on the configuration: https://jira.slac.stanford.edu/browse/LPATE-56
• P250-ROOT task web page.
• Contacts for this task and its data: Johan Bregeon, Leon Rochester and Tom Glanzman