Support update of Edge configuration (except Edge Services)

[slavaavr]

Hi there. This PR kind of related with this issue #202
I got it how you decided to implement Edge update, however, I think this method will not be needless. What do you think of it?

[dataclouder]

Thanks for your contribution.
We are already in the process of implementing a full update of Edge Gateway.
Although the update function is conceptually simple, it requires extensive additional testing to make sure we are covering all the cases.

The function that you propose will end up being a duplicate effort, and given that it doesn't come with tests, it will be of little value in these circumstances.

[slavaavr]

@dataclouder oh, I see. So, when do you think update function will be released (approximately)? And what I have to do with this PR, close it for now?

[datacharmer]

I think you can close for now. We don't have an official release date yet, although our release cycles are usually 3 to 4 months

[slavaavr]

@datacharmer, i got it. Thanks!