Repeatable jobs do not check for existence

[pc-jedi]

In the docs it says:

Bull is smart enough not to add the same repeatable job if the repeat options are the same.

But there is even a test that this should work:
https://github.com/taskforcesh/bullmq/blob/master/src/test/test_repeat.ts#L373-L386

I guess the issue is that skipCheckExists is hardcoded to true

I see two ways to fix this:

1. Remove the sentence from the docs.
2. Expose the skipCheckExists via JobsOptions and do not hardcoded it to true.

[pc-jedi]

Ping @manast

[manast]

The documentation is correct. The test is not testing what you highlighted, it is testing, maybe clumsily so, what the documentation says.

[roggervalf]

#769 tries to add more context on repeatable configs, please @pc-jedi when you get a chance, take a look.