add autosign_grains field to minion auth event

[rico256-cn]

key code:

found_autosign_grains = True if 'autosign_grains' in load else False

eload['grains'] = load['autosign_grains'] if found_autosign_grains else None

What does this PR do?

add autosign_grains field to minion auth event data, for example:

salt/auth	{
    "_stamp": "2020-02-25T02:45:24.617314",
    "act": "accept",
    "grains": {
        "cpu_model": "Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz",
        "cpuarch": "x86_64",
        "dns": {
            "domain": "",
            "ip4_nameservers": [
                "192.168.96.2"
            ],
            "ip6_nameservers": [],
            "nameservers": [
                "192.168.96.2"
            ],
            "options": [],
            "search": [
                "localdomain"
            ],
            "sortlist": []
        },
        "domain": "localdomain",
        "fqdn": "localhost.localdomain",
        "hwaddr_interfaces": {
            "docker0": "02:42:0c:4b:e8:8e",
            "ens33": "00:0c:29:c6:5c:dc",
            "ens34": "00:0c:29:c6:5c:e6",
            "lo": "00:00:00:00:00:00"
        },
        "ip_interfaces": {
            "docker0": [
                "9.0.0.1",
                "fe80::42:cff:fe4b:e88e"
            ],
            "ens33": [
                "192.168.96.223",
                "fe80::7682:c46e:fdc7:ab11"
            ],
            "ens34": [
                "192.168.201.52",
                "fe80::d230:9771:4415:936d",
                "fe80::6a46:b255:16a2:b6b6"
            ],
            "lo": [
                "127.0.0.1",
                "::1"
            ]
        },
        "kernel": "Linux",
        "kernelrelease": "5.4.10-1.el7.elrepo.x86_64",
        "kernelversion": "#1 SMP Thu Jan 9 09:33:52 EST 2020",
        "manufacturer": "VMware, Inc.",
        "mem_total": 1963,
        "nodename": "x2",
        "num_cpus": 2,
        "os": "CentOS",
        "osarch": "x86_64",
        "osrelease": "7.6.1810",
        "productname": "VMware Virtual Platform",
        "saltversion": "3000",
        "saltversioninfo": [
            3000,
            null,
            null,
            0
        ],
        "serialnumber": "VMware-56 4d 4a b5 d1 e6 83 82-ff 13 1f 5c f0 c6 5c dc",
        "server_id": 875942337,
        "uuid": "b54a4d56-e6d1-8283-ff13-1f5cf0c65cdc"
    },
    "id": "b54a4d56-e6d1-8283-ff13-1f5cf0c65cdc",
    "pub": "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAx+H5M3GyNmmuP9Fe2hRp\nSsvq5RtVYgZv50WbIQMiAlGcVVCHigQCwD9SWG7J68RuIO/hbupigxVUIwGLhlyM\nPeazAA7xqpBgMYqIfJ3y1kBcJQPlUU3EU9SnGaOAvi0spe3GcLFxx+nucmLaVa1F\n69v1V2mxyOOBu8qleFuOMumHy3iKlVpAXE5f2nRixIxSsCJO/xCA3VS+A8lmTM2p\nLtwNapvLvPv2OStnW2s1aoHBF40tcqfProu3BtrimFjW4Zc9iLtuTO3gEzxjet5U\nbDCQPt2nifqPmvOfjKn6BT7tdr9ScRAZXe7HpCuhhVc8A56lrpp7Uf0viRxupxd8\ngQIDAQAB\n-----END PUBLIC KEY-----\n",
    "result": true
}

What issues does this PR fix or reference?

Previous Behavior

Remove this section if not relevant

New Behavior

Remove this section if not relevant

Tests written?

[NOTICE] Bug fixes or features added to Salt require tests.
Please review the test documentation for details on how to implement tests into Salt's test suite.

Yes/No

Commits signed with GPG?

Yes/No

Please review Salt's Contributing Guide for best practices.

See GitHub's page on GPG signing for more information about signing commits with GPG.

[rico256-cn]

@xeacott

[rico256-cn]

@xeacott

[DmitryKuzmenko]

@rico256-cn I'm not quite understand the reason of doing that. Could you please describe ins some details?
Also to get the changes working you have to put them directly to the salt/transport/mixins/auth.py.

[DmitryKuzmenko]

This contains no description nor the code as a change. Looks like accidentally pushed some working code? Alos no response for more than 2 months. So I'm closing this. @rico256-cn if you still interested on this please create a new PR.