Tennant Middleware is not storing the correlation id in the HttpContext

[StuartFerguson]

In InvokeAsync of the TennantMiddleware this block:

if (correlationId != Guid.Empty)
{
    tenantContext.SetCorrelationId(correlationId);
}

needs to be updated to this:

if (correlationId != Guid.Empty)
{
    tenantContext.SetCorrelationId(correlationId);
    context.Items[KeyNameCorrelationId] = correlationId.ToString(); // make it accessible to HttpClient handlers
}

This will allow client calls to pass on the correlation id to the next link in the HTTP chain