Description
The output MSs are named using this string plus the backend type
plus a version number: msrootname_backendtype.
This function allows you to change the default, which is the
base name of the project directory. The backendtype is
one of HOLO, DCR, SP, or ACS. If multiple ACS MeasurementSets
are being filled. There will be an additional _A, _B,
_C, or _D appended to the name as necessary.