[FEATURE REQUEST] Fully automated client install

[ValeriiVozniuk]

Please prefix your issue title with one of the following: [BUG], [ISSUE], [FEATURE REQUEST], [MODULE REQUEST], [OTHER].

Replace everything between stars with current version of your facileManager and module installations:
fM Version : 4.5.0 fmDNS Version : 5.3.3

• [x] I have read and understood the contributors guide.
• [x] I have checked that the bug-fix I am reporting can be replicated, or that the feature I am suggesting isn't already present.
• [x] I have checked that the issue I'm posting isn't already reported.
• [x] I have checked that the issue I'm posting isn't already solved and no duplicates exist in closed issues and opened issues
• [x] I have checked the pull requests tab for existing solutions/implementations to my issue/suggestion.

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(BUG | ISSUE) Expected Behavior: Be able to run php /usr/local/facileManager/fmDNS/client.php install from automated scripts

(BUG | ISSUE) Actual Behavior: There is a prompt for get updates via cron, ssh, or http(s) [c|s|h]?

(BUG | ISSUE) Steps to reproduce:

1. Deploy config.inc.php file with proper content for node connection.
2. Run php /usr/local/facileManager/fmDNS/client.php install
3. Expect to have node installed automatically, but got input prompt.

Per what I see the issue comes from https://github.com/WillyXJ/facileManager/blob/master/client/facileManager/functions.php#L811 having $update_method = null, and not taking it from DEFINEs in config.inc.php. It would be nice to have this parameter present in config too.

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