Next batch of code coverage tests. (#128)

Auto-merging test-only changes.  Please review the commit and I'll make changes in next iteration.

* Add more tests to boast code coverage

* Add more reliable connection tests.

test/Microsoft.SqlTools.ServiceLayer.Test/Connection/ConnectionServiceTests.cs

@@ -809,6 +809,33 @@ namespace Microsoft.SqlTools.ServiceLayer.Test.Connection
             Assert.True(callbackInvoked);
         }
 
+        /// <summary>
+        /// Test ConnectionSummaryComparer 
+        /// </summary>
+        [Fact]
+        public void TestConnectionSummaryComparer()
+        {
+            var summary1 = new ConnectionSummary()
+            {
+                ServerName = "localhost",
+                DatabaseName = "master",
+                UserName = "user"
+            };
+
+            var summary2 = new ConnectionSummary()
+            {
+                ServerName = "localhost",
+                DatabaseName = "master",
+                UserName = "user"
+            };
+
+            var comparer = new ConnectionSummaryComparer();
+            Assert.True(comparer.Equals(summary1, summary2));
+
+            summary2.DatabaseName = "tempdb";
+            Assert.False(comparer.Equals(summary1, summary2));
+        } 
+
         /// <summary>
         /// Verify when a connection is created that the URI -> Connection mapping is created in the connection service.
         /// </summary>