add openssh-client for using OpenMPI

1 job for master in 16 seconds
Status Job ID Name Coverage
failed #2085


Name Stage Failure
build Build There is an unknown failure, please try again
Running on runner-2cf3d82e-project-3-concurrent-0 via 062e7a06b2f5...
Cloning repository...
Cloning into '/builds/tux/slh-build'...
Checking out fdf764f3 as master...
Skipping Git submodules setup
$ docker build -t slh-build .
time="2018-07-25T14:11:17Z" level=error msg="failed to dial gRPC: cannot connect to the Docker daemon. Is 'docker daemon' running on this host?: dial unix /var/run/docker.sock: connect: no such file or directory"
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
ERROR: Job failed: exit code 1