removed comment from message-bus.xml
XD-1592 use classpath* url in message-bus.xml
removed comment from codec.xml
Fix RemoteFileToHadoopTests

- Set application context explicitly for the LocalMessageBus inside the test
Use Msgbus binding to start

- The messagebus implementations, upon registration of consumer and producer from/to messagebus
the corresponding endpoints start.
  - Instead of directly calling the start() on adapter/consumer we can call the corresponding Binding's start()
     - This is in-line with the way the corresponding endpoints are stopped (using Binding's stop()) during
undeploy/destroy
XD-1595 Remove aliasHint in MessageBus

- Remove the use of `aliasHint` flag in MessageBus bindProduce/Consumer
- Fixed `LocalMessageBus` to use `QueueChannel` provider in case of named channels (p2p channel & job input channel)
- Fixed the tests
- Remove the methods isAliasedInput()/isAliasedOutput() in Stream/Job plugins
as they are no longer needed and the Source/Sink channel names are already set
in the DeploymentMetadata if the input/output channel name is aliased
XD-1614 Fix UTC endTime display

- The `endTime` attribute on job/step execution can be null if the job/step
execution is not yet complete by the time the test does the assertion
- Add `null` check on endTime in Job job/step execution display commands
- Fix test