load reva gateway and token manager from common config

extensions/graph/pkg/config/config.go

@@ -18,7 +18,7 @@ type Config struct {
 
 	HTTP HTTP `yaml:"http,omitempty"`
 
-	Reva         Reva          `yaml:"reva,omitempty"`
+	Reva         *Reva         `yaml:"reva,omitempty"`
 	TokenManager *TokenManager `yaml:"token_manager,omitempty"`
 
 	Spaces   Spaces   `yaml:"spaces,omitempty"`

extensions/graph/pkg/config/defaults/defaultconfig.go

@@ -20,7 +20,7 @@ func DefaultConfig() *config.Config {
 		Service: config.Service{
 			Name: "graph",
 		},
-		Reva: config.Reva{
+		Reva: &config.Reva{
 			Address: "127.0.0.1:9142",
 		},
 		Spaces: config.Spaces{
@@ -91,7 +91,7 @@ func EnsureDefaults(cfg *config.Config) {
 		cfg.TokenManager = &config.TokenManager{
 			JWTSecret: cfg.Commons.TokenManager.JWTSecret,
 		}
-	} else {
+	} else if cfg.TokenManager == nil {
 		cfg.TokenManager = &config.TokenManager{}
 	}
 }

extensions/graph/pkg/service/v0/service.go

@@ -59,7 +59,7 @@ func NewService(opts ...Option) Service {
 	switch options.Config.Identity.Backend {
 	case "cs3":
 		backend = &identity.CS3{
-			Config: &options.Config.Reva,
+			Config: options.Config.Reva,
 			Logger: &options.Logger,
 		}
 	case "ldap":