描述bug

在家里，我不允许egress 53进行任何DNS查询，除非它来自我的pihole。DHCP为使用DHCP选项的客户端提供正确的DNS。
看起来有一些启动工具/测试试图验证关于网络的一些内容，并假定它将被允许与Google DNS(8.8.8.8或8.8.4.4)通信。

$ cat /etc/resolv.confnf
# Generated by resolvconf
domain local
nameserver 127.0.0.1

$ cat  /run/dnsmasq/resolv.conf
# Generated by resolvconf
nameserver 10.0.0.60

(.venv) pi@picroft:~ $ systemctl status dnsmasq
● dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server
   Loaded: loaded (/lib/systemd/system/dnsmasq.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2022-05-23 14:02:57 BST; 8min ago
  Process: 397 ExecStartPre=/usr/sbin/dnsmasq --test (code=exited, status=0/SUCCESS)
  Process: 408 ExecStart=/etc/init.d/dnsmasq systemd-exec (code=exited, status=0/SUCCESS)
  Process: 420 ExecStartPost=/etc/init.d/dnsmasq systemd-start-resolvconf (code=exited, status=0/SUCCESS)
 Main PID: 418 (dnsmasq)
    Tasks: 1 (limit: 2200)
   Memory: 3.0M
   CGroup: /system.slice/dnsmasq.service
           └─418 /usr/sbin/dnsmasq -x /run/dnsmasq/dnsmasq.pid -u dnsmasq -r /run/dnsmasq/resolv.conf -7 /etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new --local-service -

(snip)
May 23 14:02:57 picroft systemd[1]: Started dnsmasq - A lightweight DHCP and caching DNS server.
May 23 14:03:09 picroft dnsmasq[418]: reading /run/dnsmasq/resolv.conf
May 23 14:03:09 picroft dnsmasq[418]: using nameserver 10.0.0.60#53

2022-05-23 14:03:48.662 | ERROR    |   755 | mycroft.util.network_utils:_connected_dns:69 | Unable to connect to primary DNS server, trying secondary...
2022-05-23 14:03:51.667 | ERROR    |   755 | mycroft.util.network_utils:_connected_dns:78 | Unable to connect to secondary DNS server.

重现

重现行为的方法：

1. 阻止Google DNS
2. 将树莓派启动，ssh进入其中，并检查日志。
3. pi@picroft:/var/log/mycroft/skills.log

预期行为

UTs应使用系统DNS(非硬编码)

日志文件

2022-05-23 14:03:48.662 | ERROR    |   755 | mycroft.util.network_utils:_connected_dns:69 | Unable to connect to primary DNS server, trying secondary...
2022-05-23 14:03:51.667 | ERROR    |   755 | mycroft.util.network_utils:_connected_dns:78 | Unable to connect to secondary DNS server.

mycroft-core/test/unittests/util/test_network_utils.py:15:    def test_dns_and_ncsi_fail(self, mock_conf):
mycroft-core/test/unittests/util/test_network_utils.py:16:        """Check that DNS and NCSI failure results in False response"""
mycroft-core/test/unittests/util/test_network_utils.py:19:                "dns_primary": "127.0.0.1",
mycroft-core/test/unittests/util/test_network_utils.py:20:                "dns_secondary": "127.0.0.1",
mycroft-core/test/unittests/util/test_network_utils.py:28:    def test_secondary_dns_succeeds(self, mock_conf):
mycroft-core/test/unittests/util/test_network_utils.py:29:        """Check that only primary DNS failing still succeeds"""
mycroft-core/test/unittests/util/test_network_utils.py:32:                "dns_primary": "127.0.0.1",
mycroft-core/test/unittests/util/test_network_utils.py:33:                "dns_secondary": "8.8.4.4",
mycroft-core/test/unittests/util/test_network_utils.py:41:    def test_dns_success_url_fail(self, mock_conf):
mycroft-core/test/unittests/util/test_network_utils.py:45:                "dns_primary": "8.8.8.8",
mycroft-core/test/unittests/util/test_network_utils.py:46:                "dns_secondary": "8.8.4.4",

环境信息(请填写以下信息):

• 设备类型：[例如树莓派]
• OS:[Picroft]
• Mycroft-core版本：[例如21.2.2]
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