Update devfile sample output in deploying-a-devfile-using-odo.adoc

[johnmcollier]

/kind documentation
/area devfile

The sample output in deploying-a-devfile-using-odo.adoc is out of date and from pre odo 1.2.0. We should update the samples on that page so that they reflect what's current in odo 1.2.0.

For example, the doc has the following for odo push:

   $ odo push
    •  Push devfile component myspring  ...
    ✓  Waiting for component to start [30s]

   Applying URL changes
    ✓  URL myspring-8080: http://myspring-8080.apps-crc.testing created
    ✓  Checking files for pushing [752719ns]
    ✓  Syncing files to the component [887ms]
    ✓  Executing devbuild command "/artifacts/bin/build-container-full.sh" [23s]
    ✓  Executing devrun command "/artifacts/bin/start-server.sh" [2s]
    ✓  Push devfile component myspring [57s]
    ✓  Changes successfully pushed to component

When it should be:

$ odo push

  Validation
   ✓  Validating the devfile [81808ns]

  Creating Kubernetes resources for component myspring
   ✓  Waiting for component to start [5s]

  Applying URL changes
   ✓  URL myspring-8080: http://myspring-8080.apps-crc.testing created

  Syncing to component myspring
   ✓  Checking files for pushing [2ms]
   ✓  Syncing files to the component [1s]

  Executing devfile commands for component myspring
   ✓  Executing devbuild command "/artifacts/bin/build-container-full.sh" [1m]
   ✓  Executing devrun command "/artifacts/bin/start-server.sh" [2s]

  Pushing devfile component myspring
   ✓  Changes successfully pushed to component

We should also mention the --downloadSource flag that was added in 1.2.0.

[johnmcollier]

/assign