Update hdf5_to_sparse.py to make genome configurable.

[deflaux]

Currently the genome name is hardcoded:

scalable_analytics/data_loading/hdf5_to_sparse.py

Line 24 in 7de3671

GENOME = 'mm10'

Instead add the genome name as a new column in the parameter file:

scalable_analytics/data_loading/hdf5_to_sparse_tasks.tsv

Line 1 in 7de3671

--env BEGIN_IDX --env END_IDX --input INPUT_FILE --output OUTPUT_FILE