Peek definition support for tables, views and stored procedures (#160)

* Add support for peek/go to definition
Add unit tests for definition

Microsoft/vscode-mssql#253 and Microsoft/vscode-mssql#268

* Format Strings

* Add integration tests

* Refactor variable names

* Remove test file

* Remove LIVE_CONNECTION definition

* Change method name

* Write files to a separate directory

* Refactor GetDefinition

* Remove unnecessary whitespace and modify variable name

* Check intellisense settings

* Refactor code to be scalable and modify tests

* Refactor to facilitate CodeGen

* Reorder methods

* Modify method to strip bracket syntax

* Add one_second constant

* Add comments

* Modify null check

* Modify GetSchema code to account for spaces

* Alter variable names and modify null checks

* Remove timeout callback and refactor null check

* remove LIVE_CONNECTION_TEST definition

test/Microsoft.SqlTools.ServiceLayer.Test/Utility/TestObjects.cs

@@ -191,6 +191,27 @@ namespace Microsoft.SqlTools.Test.Utility
             connectionService.TryFindConnection(ownerUri, out connInfo);
             return connInfo;
         }
+
+        public static ConnectionInfo InitLiveConnectionInfoForDefinition()
+        {
+            TestObjects.InitializeTestServices();
+
+            string ownerUri = ScriptUri;
+            var connectionService = TestObjects.GetLiveTestConnectionService();
+            var connectionResult =
+                connectionService
+                .Connect(new ConnectParams()
+                {
+                    OwnerUri = ownerUri,
+                    Connection = TestObjects.GetIntegratedTestConnectionDetails()
+                });
+            
+            connectionResult.Wait();
+
+            ConnectionInfo connInfo = null;
+            connectionService.TryFindConnection(ownerUri, out connInfo);
+            return connInfo;
+        }
     }
 
     /// <summary>