Log output contains redundant timestamps

[michaelpj]

The same timestamp appears multiple times here, making the log output much longer than it needs to be since the timestamp is one of the longest bits.

[dermetfan]

This is not a cicero bug but a problem with nomad's podman driver. We plan to post-process its logs in vector to get rid of the double timestamp though, or get rid of the podman driver altogether as it also causes #69.

[dermetfan]

Closing as there are virtually no podman jobs left, they are all exec now.