Increase the default yum timeout to 5 minutes.

11.6.0 introduced timeout to package resources that are using yum. 

Currently the default timeout is set to 2 minutes. We've found out during test-kitchen tests that 2 minutes is a small amount of timeout and some customers might hit this timeout by just upgrading to 11.6. 

This PR increases the timeout to 5 minutes. I strongly think we should increase the timeout and I'm open to any other number than 5 minutes :)