title: Swagger shows endpoints from other project
body: <p>I got a solution with few projects. 
  Few of them use (are) Web Api's.
  There I use Swagger.</p>
  
  <p>At one of the projects (project A) I have only one endpoint.
  But when I start Swagger, I see also the endpoints of one other project (project B).
  Other way around I don't see the one endpoint (A) at the Swagger of the (B) project.</p>
  
  <p>The Swagger configurations are similar at both projects.</p>
  
  <pre><code>public void ConfigureServices(IServiceCollection services)
  {
      services.AddSwaggerGen(c =&gt;
      {
          c.SwaggerDoc("v1", new Info
          {
              Title = "My Platform – A",
              Version = "v1",
              Description = "A ~ ASP.NET Core Web API"
          });
      }); // ...
  }
  
  public void Configure(IApplicationBuilder app, IHostingEnvironment env)
  {
      app.UseSwagger();
      app.UseSwaggerUI(c =&gt;
      {
          c.SwaggerEndpoint("swagger/v1/swagger.json", "A V1");
          c.DocExpansion(Swashbuckle.AspNetCore.SwaggerUI.DocExpansion.None);
          c.RoutePrefix = string.Empty;
      }); // ...
  }
  </code></pre>
  
  <p>How can it be?
  <strong>What I need to change to get only the own endpoint(-s)?</strong></p>