Exceptions in SDK code exposed to users

[Tolk-Haggard]

The CenturyLInkCloudServiceException may be populated with an inner exception unexpectedly thrown from within the SDK which would not provide the user with any valuable information while revealing problems within the SDK itself.

For example, consider a bug introduced into the DeserializeAPIErrorMessage method for the following line:
https://github.com/CenturyLinkCloud/CenturyLinkCloud-.NET-SDK/blob/master/CenturyLinkCloudSDK/Runtime/ServiceInvoker.cs#L62
This exception would be caught and then returned inside the CenturyLinkCloudServiceException to the consumer.

[rpierry]

I have refactored serviceinvoker, but in general we attempt to provide the inner exception because it is usually the underlying cause of the issue (something http related from a failed request, a failure to parse because the response was unexpected, etc.)