Add log event properties to eventhubdata

[ahmagdy]

EventHub Data will always ignore LogEvent Properties, this PR will pass and allow EventHubData to use them.
LogEvent properties can contain a lot of additional information from the program and it will be usually used with Sentry or other Serilog Sinks.

[adamchester]

Hey @ahmad-magdy thanks for stopping by.

Looks like this attempts to address #9.

I think would be safer if there was a way to opt-in to adding properties.

I wonder if we can take inspiration from any other sinks that have a similar behaviour implemented?

Would you be interested in designing such a feature?

[ahmagdy]

Hi @adamchester
Thanks.
Sure, let me take a look into it today.

[ahmagdy]

@adamchester What do you think about now?
I reused Simplify method from https://github.com/serilog/serilog-sinks-azuredocumentdb/blob/master/src/Serilog.Sinks.AzureDocumentDb/Sinks/Extensions/LogEventExtensions.cs#L102
With some modification and i have tested the changes against event hub and i think it works.

[adamchester]

@ahmad-magdy sorry for the delay in replying here.

What I meant was I think there needs to be a way to allow the user of the sink to decide which properties will be added as event hub properties and which ones will be in the payload.

I wonder if we can come up with simple way to achieve that?