The goal of this make sure that test code is correctly organized to ensure that test suites aren't dependent on each other.
* UnitTests get their own project now (renaming Microsoft.SqlTools.ServiceLayer.Test to Microsoft.SqlTools.ServiceLayer.UnitTests) which is about 90% of the changes to the files.
* IntegrationTests no longer depends on UnitTests, only Test.Common
* Any shared components from TestObjects that spins up a "live" connection has been moved to IntegrationTests Utility/LiveConnectionHelper.cs
* The dictionary-based mock file stream factory has been moved to Test.Common since it is used by UnitTests and IntegrationTests
* Added a overload that doesn't take a dictionary for when we don't care about monitoring the storage (about 90% of the time)
* The RunIf* wrapper methods have been moved to Test.Common
* OwnerUri and StandardQuery constants have been moved to Test.Common Constants file
* Updating to latest SDK version available at https://www.microsoft.com/net/core#windowscmd
* Moving unit tests to unit test folder
* Changing namespaces to UnitTests
* Moving some constants and shared functionality into common project, making the UnitTests reference it
* Unit tests are working!
* Integration tests are working
* Updating automated test runs
* Fixing one last broken unit test
* Exposing internals for other projects
* Moving edit data tests to UnitTest project
* Applying refactor fixes to unit tests
* Fixing flaky test that wasn't awaiting completion
* added a new tool to store SQL connections locally. Modified the peek definition tests to create test database before running test
* fixed failing test QueryExecutionPlanInvalidParamsTest
* Fixes based on code review comments
* fixed failing test GetSignatureHelpReturnsNotNullIfParseInfoInitialized
* Add CancelTokenKey for uniquely identifying cancelations of Connections associated with an OwnerUri and ConnectionType string.
* Update ConnectionInfo to use ConcurrentDictionary of DbConnection instances. Add wrapper functions for the ConcurrentDictionary.
* Refactor Connect and Disconnect in ConnectionService.
* Update ConnectionService: Handle multiple connections per ConnectionInfo. Handle cancelation tokens uniquely identified with CancelTokenKey. Add GetOrOpenConnection() for other services to request an existing or create a new DbConnection.
* Add ConnectionType.cs for ConnectionType strings.
* Add ConnectionType string to ConnectParams, ConnectionCompleteNotification, DisconnectParams.
* Update Query ExecuteInternal to use the dedicated query connection and GetOrOpenConnection().
* Update test library to account for multiple connections in ConnectionInfo.
* Write tests ensuring multiple connections don’t create redundant data.
* Write tests ensuring database changes affect all connections of a given ConnectionInfo.
* Write tests for TRANSACTION statements and temp tables.
