Improve JSON schema for keptn, include Flux plugin in build, fix plugin count

Makefile

@@ -89,7 +89,7 @@ gen-grpc-resources:
 # Generate plugins YAML index files for both all plugins and end-user ones.
 gen-plugins-index: build-plugins
 	go run ./hack/gen-plugin-index.go -output-path ./plugins-dev-index.yaml
-	go run ./hack/gen-plugin-index.go -output-path ./plugins-index.yaml -plugin-name-filter 'kubectl|helm|kubernetes|prometheus|exec|doctor|keptn|github-events'
+	go run ./hack/gen-plugin-index.go -output-path ./plugins-index.yaml -plugin-name-filter 'kubectl|helm|kubernetes|prometheus|exec|doctor|keptn|github-events|flux'
 
 gen-docs-cli:
 	rm -f ./cmd/cli/docs/*

internal/cli/migrate/migrate.go

@@ -69,7 +69,7 @@ func migrate(ctx context.Context, status *printer.StatusPrinter, opts Options, b
 	}
 
 	pluginsCount := 0
-	if len(plugins) != 0 || len(plugins[0].Groups) != 0 {
+	if len(plugins) != 0 && len(plugins[0].Groups) != 0 {
 		pluginsCount = len(plugins[0].Groups)
 	}
 	status.Step("Converted %d plugins", pluginsCount)

internal/source/keptn/source.go

@@ -124,21 +124,25 @@ func jsonSchema() api.JSONSchema {
 			"type": "object",
 			"properties": {
 			  "url": {
-				"description": "Keptn API endpoint",
+				"description": "Keptn API Gateway URL",
 				"type": "string",
-				"default": "http://localhost:8080/api"
+				"default": "http://api-gateway-nginx.keptn.svc.cluster.local/api",
+				"title": "Endpoint URL"
 			  },
 			  "token": {
 				"description": "Keptn API Token",
-				"type": "string"
+				"type": "string",
+				"title": "Token"
 			  },
 			  "project": {
 				"description": "Keptn Project",
-				"type": "string"
+				"type": "string",
+				"title": "Project"
 			  },
 			  "service": {
-				"description": "Keptn Service",
-				"type": "string"
+				"description": "Keptn Service name under the project",
+				"type": "string",
+				"title": "Service"
 			  }
 			},
             "required": [