Expand XML docs across bridge and test code

tests/ZB.MOM.WW.LmxOpcUa.IntegrationTests/SampleIntegrationTest.cs

@@ -3,8 +3,14 @@ using Xunit;
 
 namespace ZB.MOM.WW.LmxOpcUa.IntegrationTests
 {
+    /// <summary>
+    /// Placeholder integration test that keeps the integration test project wired into the solution.
+    /// </summary>
     public class SampleIntegrationTest
     {
+        /// <summary>
+        /// Confirms that the integration test assembly is executing.
+        /// </summary>
         [Fact]
         public void Placeholder_ShouldPass()
         {