func GetClientConnection(ctx context.Context, addr string, port int) (*grpc.ClientConn, error) {
	return GetClientConnectionWithCreds(ctx, addr, port, nil)
}
GetClientConnection returns a grcp.ClientConn that is unsecured
package rpcutil
import (
	"fmt"
	"time"
	"golang.org/x/net/context"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials"
)
const grpcDialDefaultTimeout = 2 * time.Second