cloud-infra: Install shellcheck from snap

apt does not have shellcheck v0.7.0 so shellcheck is installed from
snap instead.

Change-Id: I243279402de73fad3d0f3c7e1067c9feffcc1a07
1 file changed
tree: 9153503989d9a71d360755ef8ac4afab3a4f9f47
  1. jjb/
  2. .gitignore
  3. .gitreview