update unit test

Author: Wangyang Ding

WorkflowCore.sln

@@ -152,8 +152,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WorkflowCore.Sample19", "sr
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WorkflowCore.Persistence.RavenDB", "src\providers\WorkflowCore.Persistence.RavenDB\WorkflowCore.Persistence.RavenDB.csproj", "{AF205715-C8B7-42EF-BF14-AFC9E7F27242}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WorkflowCore.Tests.YmalDefinition", "test\WorkflowCore.Tests.YmalDefinition\WorkflowCore.Tests.YmalDefinition.csproj", "{099259BB-ABCD-4C7C-AFAE-56A2730B9309}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -376,10 +374,6 @@ Global
 		{AF205715-C8B7-42EF-BF14-AFC9E7F27242}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{AF205715-C8B7-42EF-BF14-AFC9E7F27242}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{AF205715-C8B7-42EF-BF14-AFC9E7F27242}.Release|Any CPU.Build.0 = Release|Any CPU
-		{099259BB-ABCD-4C7C-AFAE-56A2730B9309}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{099259BB-ABCD-4C7C-AFAE-56A2730B9309}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{099259BB-ABCD-4C7C-AFAE-56A2730B9309}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{099259BB-ABCD-4C7C-AFAE-56A2730B9309}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -442,7 +436,6 @@ Global
 		{54DE20BA-EBA7-4BF0-9BD9-F03766849716} = {E6CEAD8D-F565-471E-A0DC-676F54EAEDEB}
 		{1223ED47-3E5E-4960-B70D-DFAF550F6666} = {5080DB09-CBE8-4C45-9957-C3BB7651755E}
 		{AF205715-C8B7-42EF-BF14-AFC9E7F27242} = {2EEE6ABD-EE9B-473F-AF2D-6DABB85D7BA2}
-		{099259BB-ABCD-4C7C-AFAE-56A2730B9309} = {E6CEAD8D-F565-471E-A0DC-676F54EAEDEB}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {DC0FA8D3-6449-4FDA-BB46-ECF58FAD23B4}