integration tests needs lsof
We need/use `lsof` in integration tests:
`TestShimDoesNotLeakPipes` fails if `lsof` is not present
set -xe
set -o pipefail
apt-get update
- apt-get install -y btrfs-tools libseccomp-dev git pkg-config
+ apt-get install -y btrfs-tools libseccomp-dev git pkg-config lsof
go version
chdir: '{{ zuul.project.src_dir }}'
