RedisCache configure code-only configuration for StackExchange.Redis

[Memoyu]

Content：

RedisCache support configure code-only configuration

Usage:

var redisConfig = ConfigurationOptions.Parse("127.0.0.1:6380");
redisConfig.DefaultDatabase = 8;
services.AddEasyCaching(x =>
     x.UseRedis(options =>
     {
         options.DBConfig.ConfigurationOptions = redisConfig;
     }, ProviderName).UseRedisLock().WithJson(ProviderName));