remove import of create_cal_seqs; fix Id() calls
remove import of create_cal_seqs; fix Id() calls

Id() must use keyword arg for length (for now)

create_cal_seqs contains imports that fail, and the
function doesn't work anyway.  We don't currently
use it in our tests, so let's not import it

BBN-Q/pyqgl2,BBN-Q/pyqgl2