CB-5362 blackberry parser: support local cordova-blackberry

https://issues.apache.org/jira/browse/CB-5362

In a project directory:
.cordova/config.json:
{
  "lib": {
    "blackberry10": {
      "uri": "/path/to/cordova-blackberry/blackberry10",
      "version: "dev",
      "id": "blackberry10"
    }
  }
}