Setting API should accept String type

[takeyaqa]

Change list

Java-client Setting API setSetting(Setting, Object) only accepts enum Setting. It's good for type safe. But, when new settings are added on server, user cannot use it until client update. I think this API should be more flexible.

I propose that Setting API can also accept String type like capabilities.

Types of changes

What types of changes are you proposing/introducing to Java client?
Put an x in the boxes that apply

• No changes in production code.
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Details

Please provide more details about changes if it is necessary. If there are new features you can provide code samples which show the way they
work and possible use cases. Also you can create gists with pasted java code samples or put them here using markdown.
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[mykola-mokhnach]

Thanks. I was thinking about adding this method