All subcommands under 'oc create' must support dry run

[fabianofranz]

We need to be able to visualize how the given resource would look like in JSON and YAML before actually creating it. Some of the subcommands like oc create quota already support it, but we need to make sure it's supported for all of them.

[juanvallejo]

List of all of the oc create sub-commands without a --dry-run option:

- clusterresourcequota
- deploymentconfig
- identity
- imagestream
- policybinding
- route
- user
- useridentitymapping