Fix optional network settings

[jcronenberg]

Problem

Some settings in the network configuration are wrongly not optional or optional

Solution

Make the right settings optional

Testing

• Tested manually

sudo agama auth login && AGAMA_TOKEN=`sudo agama auth show`
curl http://localhost/api/network/connections \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer $AGAMA_TOKEN" \
    -d '{ "id": "wifi", "method4": "auto", "method6": "auto", "ignoreAutoDns": false, "wireless": { "security": "wpa-psk", "ssid": "test-ssid", "mode": "infrastructure"}, "status": "down" }'

[teclator]

LGTM

[coveralls]

Pull Request Test Coverage Report for Build 11070675318

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 70.457%

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Totals
Change from base Build 11070032807:	0.0%
Covered Lines:	15640
Relevant Lines:	22198

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💛 - Coveralls