kn needs the ability to set a default timeout for the service

[utherp0]

Feature request

kn create needs a flag for setting the default timeout for the service

Use case

I want to create my services with a default timeout of 10 seconds rather than the standard 300 - currently I can't create a service with the timeout of 10 secs and need to post-create change it (in this case using the OpenShift UI/YAML editor) which creates a new revision

There are flags for most things when creating a service but this one (timeoutSeconds) seems to be missing

/kind proposal

[rhuss]

+1. This is also a good first issue, the option should reflect the yaml field. Note that the name should be also selected that way that it does not get confused with --wait-timeout which is used as a timeout for a blocking wait.

/label good first issue