Full upgrade (#19)

- SecretName is now mandatory
- One can update client_secret in Hydra by creating new Secret object and changing the SecretName in CR instance

Makefile

@@ -17,7 +17,7 @@ test-integration:
 
 # Build manager binary
 manager: generate fmt vet
-	go build -o bin/manager main.go
+	CGO_ENABLED=0 GO111MODULE=on GOOS=linux GOARCH=amd64 go build -a -o manager main.go
 
 # Run against the configured Kubernetes cluster in ~/.kube/config
 run: generate fmt vet