user should be able to display details about SB

[kadel]

User Story

• As an odo user
• I want to be able to get details of odo binding
• So that I know what binding information is available in my application

Acceptance Criteria

• odo describe binding should display details about all binding in the current devfile.yaml and in the cluster that belong to the current component
• odo describe binding --name <binding name> should display details about given binding only in current namespace
• json output
• support for both SB resources
  • servicebindings.binding.operators.coreos.com
  • servicebindings.servicebinding.io

/kind user-story

Example

$ odo describe binding
ServiceBinding used by the current component:

Service Binding Name: myapp-mymongo
Services:
 - mymongo (PerconaServerMongoDB.psmdb.percona.com)
Bind as files: true
Detect binding resources: false
Available biding information: 
- /bindings/myapp-mymongo/username
- /bindings/myapp-mymongo/password

Service Binding Name: myapp-mymongo2
Service: 
 - mymongo (PerconaServerMongoDB.psmdb.percona.com)
Bind as files: false
Detect binding resources: false
Available biding information:
- PERCONASERVERMONGODB_PASSWORD
- PERCONASERVERMONGODB_USERNAME

# if service binding exists in devfile but not on the cluster
Service Binding Name: myapp-mymongo3
Services:
 - mymongo (PerconaServerMongoDB.psmdb.percona.com)
Bind as files: false
Detect binding resources: false
Available biding information: unknown

$ odo describe binding --name myapp-mymongo2
Service Binding Name: myapp-mymongo2
Services:
 -  mymongo (PerconaServerMongoDB.psmdb.percona.com)
Bind as files: false
Detect binding resources: false
Available biding information:
- PERCONASERVERMONGODB_PASSWORD
- PERCONASERVERMONGODB_USERNAME