修复无法切换到初始公众号配置的问题并完善了removeConfigStorage by rain7fine11 · Pull Request #1600 · binarywang/WxJava

public void setWxMpConfigStorage(WxMpConfigStorage wxConfigProvider) {
    final String defaultMpId = WxMpConfigStorageHolder.get();
    this.setMultiConfigStorages(ImmutableMap.of(defaultMpId, wxConfigProvider), defaultMpId);
  }