Clearer resource diff in tests for VerifySameResources

[maximpertsov]

Pulled out of #4273 - provides a more concise diff of resources when the test utility VerifySameResources fails. The current (verbose) diff is still included in the failure output.

Example output

# current (verbose)
robot_reconfigure_remote_test.go:143: Expected: '[]resource.Name{resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"component"}, SubtypeName:"arm"}, Remote:"", Name:"arm1"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"component"}, SubtypeName:"arm"}, Remote:"foo", Name:"remoteArm"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"motion"}, Remote:"", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"motion"}, Remote:"foo", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"sensors"}, Remote:"", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"sensors"}, Remote:"foo", Name:"builtin"}}'
        Actual:   '[]resource.Name{resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"component"}, SubtypeName:"arm"}, Remote:"", Name:"arm1"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"component"}, SubtypeName:"arm"}, Remote:"foo", Name:"remoteArm"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"remote"}, SubtypeName:""}, Remote:"", Name:"foo"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"motion"}, Remote:"", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"motion"}, Remote:"foo", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"sensors"}, Remote:"", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"sensors"}, Remote:"foo", Name:"builtin"}}'
        (Should resemble)!
        Diff:     '[]resource.Name{resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"component"}, SubtypeName:"arm"}, Remote:"", Name:"arm1"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"component"}, SubtypeName:"arm"}, Remote:"foo", Name:"remoteArm"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"remote"}, SubtypeName:""}, Remote:"", Name:"foo"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"motion"}, Remote:"", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"motion"}, Remote:"foo", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"sensors"}, Remote:"", Name:"builtin"}, resource.Name{API:resource.API{Type:resource.APIType{Namespace:resource.APINamespace("rdk"), Name:"service"}, SubtypeName:"sensors"}, Remote:"foo", Name:"builtin"}}'
      
# added (concise)
    resource_utils.go:92: Resource names do not match - see diff below: (-expected +actual)
         [
          "rdk:component:arm/arm1",
          "rdk:component:arm/foo:remoteArm",
        + "rdk:remote:/foo",
          "rdk:service:motion/builtin",
          "rdk:service:motion/foo:builtin",
          "rdk:service:sensors/builtin",
          "rdk:service:sensors/foo:builtin",
         ]