R. Short, J. Kissel

I've added into ISC_LOCK management of Jeff's new CAL_AWG_LINES guardian. In LOWNOISE_LENGTH_CONTROL, CAL_AWG_LINES will be requested to the LINES_ON state and will remain on. The lines will turn off in NLN_CAL_MEAS and will turn back on when moving back to NLN.

This change is committed to the svn.