Allow option for job name to be passed to docker as container name

[chrishoage]

I wish to be able to give "run" spawned containers meaningful names so they are easier to identify.

Here is my proposal for this feature:

By default BareJob.Name is to be passed to docker.CreateContainerOptions. In Addition to this RunJob gains Name *string.

When RunJob.Name == null then BareJob.Name is used. This allows for RunJob.Name == "" to allow the current behavior allowing docker to choose a random name should a user not want to deal with name conflicts.

This allows for a name which we already must define for ofelia to keep track of schedules to be re-used for a container now.

However - this is certainly a "breaking change".

Some ideas to mitigate this:

• opt in this feature via new global setting. e.g. global.useJobNameForContainer = "true"
• Only rely on RunJob Name *string and force name to be defined twice (e.g. Name is no longer an override for the job name)
• Live with the breaking change, since this is a fork of the original project which is in "maintenance mode"

I write this issue as I plan to make these changes no matter what - however if i can do it in a way that allows it to be upstreamed instead of a way that is easiest for me - all the better.

Let me know if this feature is desirable and which of the following approaches is best for this project.