Wait a bit longer for VM to boot

because we're generating certs.

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Print errors when copying certs fails

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Merge pull request #270 from bfirsh/wait-longer-for-vm-to-boot

Wait longer for vm to boot