Do not treat -- in the middle as a field

Change-Id: I331693babbd4b5acbf0fde0a411dcc715eefb57e
Specify network pool as address/mask

Change-Id: Ib987434e04810be11b5a95b58605e2533aaa0417
Use pooled network for SNAT rule

Change-Id: I16376ecec7007e4bed56fc1542afa1deef5b3883
Merge "Specify network pool as address/mask"
Merge "Use pooled network for SNAT rule"
Properly assign netmask variable
Merge branch 'master' into snapshot-restore

Conflicts:
	warden/lib/warden/container/linux.rb
Add tmp directory to insecure skeleton
Fix tests

The stdout/stderr fields are no longer part of the job snapshot.
Rename netmask -> pooled_netmask for clarity

The previous implementation didn't return the right netmask for exactly
this reason.