fix holes in connectivity

2 jobs for python3.6 in 2 minutes and 19 seconds (queued for 7 seconds)
Status Name Job ID Coverage
  Build
failed build #213690

00:02:19

 
  Test
skipped test #213691
 
Name Stage Failure
failed
build Build
      Successfully uninstalled meshio-2.3.10
Attempting uninstall: pybind11
Found existing installation: pybind11 2.5.0
Uninstalling pybind11-2.5.0:
Successfully uninstalled pybind11-2.5.0
ERROR: Could not install packages due to an EnvironmentError: [Errno 28] No space left on device

Cleaning up file based variables
ERROR: Job failed: exit code 1