Created Issue: Net40 CI build fails occasionally attempting to promote to distributed transaction [812]

Details of the failure are below. Note that it is not acceptable to enable DTC on the machine since we rely on the tests to let us know if we accidentally introduce a change that requires transaction promotion.

```
TemplateTests.Read_and_write_using_MonsterModel_created_from_T4_template

System.Data.Entity.Core.EntityException : The underlying provider failed on Open.
---- System.Data.SqlClient.SqlException : MSDTC on server 'UNICORNS410\SQLEXPRESS' is unavailable.

Server stack trace:
at System.Data.Entity.Core.EntityClient.EntityConnection.Open() in d:\BuildAgent\work\master\src\EntityFramework\Core\EntityClient\EntityConnection.cs:line 573
at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection() in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ObjectContext.cs:line 1452
at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ObjectQuery`.cs:line 676
at System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0() in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ObjectQuery`.cs:line 522
at System.Lazy`1.CreateValue()

Exception rethrown at [0]:
at System.Data.Entity.Core.EntityClient.EntityConnection.Open() in d:\BuildAgent\work\master\src\EntityFramework\Core\EntityClient\EntityConnection.cs:line 573
at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection() in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ObjectContext.cs:line 1452
at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ObjectQuery`.cs:line 676
at System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0() in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ObjectQuery`.cs:line 522
at System.Lazy`1.CreateValue()
at System.Lazy`1.LazyInitValue()
at System.Lazy`1.get_Value()
at System.Data.Entity.Internal.LazyEnumerator`1.MoveNext() in d:\BuildAgent\work\master\src\EntityFramework\Internal\LazyEnumerator`.cs:line 38
at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__3[TResult](IEnumerable`1 sequence) in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ELinq\ObjectQueryProvider.cs:line 238
at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot) in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ELinq\ObjectQueryProvider.cs:line 214
at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[TResult](Expression expression) in d:\BuildAgent\work\master\src\EntityFramework\Core\Objects\ELinq\ObjectQueryProvider.cs:line 127
at System.Data.Entity.Internal.Linq.DbQueryProvider.Execute[TResult](Expression expression) in d:\BuildAgent\work\master\src\EntityFramework\Internal\Linq\DbQueryProvider.cs:line 91
at System.Linq.Queryable.Single[TSource](IQueryable`1 source, Expression`1 predicate)
at ProductivityApiTests.TemplateTests.Read_and_write_using_MonsterModel_created_from_T4_template() in d:\BuildAgent\work\master\test\EntityFramework\FunctionalTests\ProductivityApi\TemplateTests.cs:line 126
----- Inner Stack Trace -----
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.TdsParser.TdsExecuteTransactionManagerRequest(Byte[] buffer, TransactionManagerRequestType request, String transactionName, TransactionManagerIsolationLevel isoLevel, Int32 timeout, SqlInternalTransaction transaction, TdsParserStateObject stateObj, Boolean isDelegateControlRequest)
at System.Data.SqlClient.TdsParser.GetDTCAddress(Int32 timeout, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlInternalConnectionTds.GetDTCAddress()
at System.Data.SqlClient.SqlInternalConnection.EnlistNonNull(Transaction tx)
at System.Data.SqlClient.SqlInternalConnection.Enlist(Transaction tx)
at System.Data.SqlClient.SqlInternalConnectionTds.Activate(Transaction transaction)
at System.Data.ProviderBase.DbConnectionInternal.ActivateConnection(Transaction transaction)
at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at System.Data.Entity.Core.EntityClient.EntityConnection.Open() in d:\BuildAgent\work\master\src\EntityFramework\Core\EntityClient\EntityConnection.cs:line 561
```