Correct several namespace requires

These were messed up by slamhound.
Update to script-exec-0.3.4

Adds support for agent forwarding.
Ensure correct permissions under /var/lib/pallet

The ownership and permissions under /var/lib/pallet should mirror the ownership
and permissiond of the reflected filesystem, otherwise difficult to understand
permission problems occur.
Allow SSH_AUTH_SOCK for automated-admin-user sudo
Set SSH_AUTH_SOCK in action shells

Ensure the shell that each action runs in sees any forwarded agent.
Add debug logging to script-builder
Update local exec logging to match ssh
Allow :apt in :deb crate-install method
Enable ssh-agent forwarding

The :ssh-agent-forwarding action option can be used to enable ssh agent
forwarding.
Fix :new-login-after-action action option