add wiretrustee LOGIN command (#90)

* feature: add wiretrustee LOGIN command

* chore: add management initial connection timeout

* test: add login cmd test

* test: validate generated config in login cmd

* test: add up command test

* chore: add timeout to signal client creation method

* test: close wireguard interface once test finished

client/cmd/testutil.go

@@ -0,0 +1,54 @@
+package cmd
+
+import (
+	mgmtProto "github.com/wiretrustee/wiretrustee/management/proto"
+	mgmt "github.com/wiretrustee/wiretrustee/management/server"
+	sigProto "github.com/wiretrustee/wiretrustee/signal/proto"
+	sig "github.com/wiretrustee/wiretrustee/signal/server"
+	"google.golang.org/grpc"
+	"net"
+	"testing"
+)
+
+func startSignal(t *testing.T) (*grpc.Server, net.Listener) {
+	lis, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	s := grpc.NewServer()
+	sigProto.RegisterSignalExchangeServer(s, sig.NewServer())
+	go func() {
+		if err := s.Serve(lis); err != nil {
+			panic(err)
+		}
+	}()
+
+	return s, lis
+}
+
+func startManagement(config *mgmt.Config, t *testing.T) (*grpc.Server, net.Listener) {
+	lis, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	s := grpc.NewServer()
+	store, err := mgmt.NewStore(config.Datadir)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	accountManager := mgmt.NewManager(store)
+	mgmtServer, err := mgmt.NewServer(config, accountManager)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mgmtProto.RegisterManagementServiceServer(s, mgmtServer)
+	go func() {
+		if err := s.Serve(lis); err != nil {
+			t.Error(err)
+			return
+		}
+	}()
+
+	return s, lis
+}