Reorganize UI tests and minor code updates (AzureAD#2556)

* merge UI test projects
* minor refactoring

Microsoft.Identity.Web.sln

@@ -170,7 +170,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "GraphServiceClientTests", "
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SimulateOidc", "tests\IntegrationTests\SimulateOidc\SimulateOidc.csproj", "{9014A1C1-7552-4950-AB86-7BE97B301701}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WebAppCallsApiCallsGraphUiTests", "tests\IntegrationTests\WebAppCallsApiCallsGraphUiTests\WebAppCallsApiCallsGraphUiTests.csproj", "{39B42C49-D634-4341-936F-B18A91DBF8AB}"
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Ciam-webapp-calls-api", "Ciam-webapp-calls-api", "{550A2811-1E95-4381-967D-97CC2409B715}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "myWebApi", "tests\DevApps\ciam\myWebApi\myWebApi.csproj", "{123D0BD0-1896-498A-8641-C6E80D070968}"
@@ -398,10 +397,6 @@ Global
 		{9014A1C1-7552-4950-AB86-7BE97B301701}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{9014A1C1-7552-4950-AB86-7BE97B301701}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{9014A1C1-7552-4950-AB86-7BE97B301701}.Release|Any CPU.Build.0 = Release|Any CPU
-		{39B42C49-D634-4341-936F-B18A91DBF8AB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{39B42C49-D634-4341-936F-B18A91DBF8AB}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{39B42C49-D634-4341-936F-B18A91DBF8AB}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{39B42C49-D634-4341-936F-B18A91DBF8AB}.Release|Any CPU.Build.0 = Release|Any CPU
 		{123D0BD0-1896-498A-8641-C6E80D070968}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{123D0BD0-1896-498A-8641-C6E80D070968}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{123D0BD0-1896-498A-8641-C6E80D070968}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -488,7 +483,6 @@ Global
 		{608F0E0B-A52D-4E0F-9B1A-BA9BDA866484} = {1DDE1AAC-5AE6-4725-94B6-A26C58D3423F}
 		{F686A507-CAC6-4349-9112-27F5AEFBF12B} = {A7B1AE31-4E89-42A0-8264-FBEA795AB7D2}
 		{9014A1C1-7552-4950-AB86-7BE97B301701} = {A7B1AE31-4E89-42A0-8264-FBEA795AB7D2}
-		{39B42C49-D634-4341-936F-B18A91DBF8AB} = {A7B1AE31-4E89-42A0-8264-FBEA795AB7D2}
 		{550A2811-1E95-4381-967D-97CC2409B715} = {7786D2DD-9EE4-42E1-B587-740A2E15C41D}
 		{123D0BD0-1896-498A-8641-C6E80D070968} = {550A2811-1E95-4381-967D-97CC2409B715}
 		{1C23A824-A9D3-46BC-822A-9BA3DE00CEB8} = {550A2811-1E95-4381-967D-97CC2409B715}