* Update serving to 0.8. Try building.
* Find the right serving version
* Change our own import path to knative.dev to match
* Remove dependency on old version of client
* Update yaml template
* Add sleep to test to deal with race
* fix merge conflict
* Update vendor modules
- Accepts an argument name for listing particular route
- Enables the machine readable output flags
- Updates docs for kn route command group
- Adds unit tests for route command group and route list
- Adds integration tests for route list in basic workflow test
- Updates tests and getting namespace
- Adds more unit tests for code in pkg/kn/commands/route/list_flags.go
- Adds route list command in smoke tests
- Updates vendor/modules.txt
- Clean up imports
- Addresses review comments
- replaces knative to Knative
- uses reflect.DeepEqual for slice comparison
- removes few code comments
- removes irrelevant tests modifications from the PR