svd_utils.rebuild_svd bug in create_indexed_group

Created by: rajgiriUW

I think this was a bug in commit f327da7d in updating svd_utils:

line 328: rebuilt_grp = create_indexed_group('Rebuilt_Data', h5_svd_group.name[1:])

throws an error since create_indexed_group requires a h5Py group, not string.

I think this change should work (will test): rebuilt_grp = create_indexed_group(h5_svd_group, 'Rebuilt_Data')