Fix sparse lbm

8 jobs for UpdateAPISparse in 11 minutes and 7 seconds (queued for 2 seconds)
Name Stage Failure
failed
flake8-lint Test
lbmpy/sparse/mapping.py:5:1: F401 'sympy as sp' imported but unused
lbmpy/sparse/mapping.py:9:1: F401 'lbmpy.boundaries.boundaryhandling.LbmWeightInfo' imported but unused
lbmpy/sparse/mapping.py:11:1: F401 'pystencils.boundaries.boundaryhandling.BoundaryOffsetInfo' imported but unused
lbmpy/sparse/mapping.py:12:1: F401 'pystencils.boundaries.createindexlist.direction_member_name' imported but unused
lbmpy/sparse/mapping.py:16:1: F811 redefinition of unused 'Assignment' from line 10
lbmpy/sparse/mapping.py:224:9: F841 local variable 'neighbour_offset' is assigned to but never used
lbmpy/sparse/mapping.py:248:9: F841 local variable 'center_coordinates' is assigned to but never used
Cleaning up file based variables
ERROR: Job failed: exit code 1
failed
ubuntu Test

-- Docs: http://doc.pytest.org/en/latest/warnings.html
======== 1 failed, 438 passed, 4 skipped, 1 warnings in 362.82 seconds =========
Uploading artifacts for failed job
Uploading artifacts...
report.xml: found 1 matching files and directories

Uploading artifacts as "junit" to coordinator... ok
id=590916 responseStatus=201 Created token=8QBLbx4Y
Cleaning up file based variables
ERROR: Job failed: exit code 1
failed
tests-and-coverage Test
Uploading artifacts as "archive" to coordinator... ok  id=590913 responseStatus=201 Created token=Ws8Ts4S_
Uploading artifacts...
WARNING: coverage.xml: no matching files
ERROR: No files to upload
Uploading artifacts...
report.xml: found 1 matching files and directories

Uploading artifacts as "junit" to coordinator... ok
id=590913 responseStatus=201 Created token=Ws8Ts4S_
Cleaning up file based variables
ERROR: Job failed: exit code 1