Hotfixes for 4.2.0 (#630)

* Fix mac env variables not getting skip activation

* Fix image tag for linux il2cpp. Force tests to use il2cpp

* Scripting backend is always il2cpp

test-project/ProjectSettings/ProjectSettings.asset

@@ -806,6 +806,8 @@ PlayerSettings:
   platformArchitecture: {}
   scriptingBackend:
     Android: 1
+    Server: 1
+    Standalone: 1
   il2cppCompilerConfiguration: {}
   managedStrippingLevel: {}
   incrementalIl2cppBuild: {}
@@ -821,8 +823,8 @@ PlayerSettings:
   apiCompatibilityLevelPerPlatform: {}
   m_RenderingPath: 1
   m_MobileRenderingPath: 1
-  metroPackageName: Template_3D
-  metroPackageVersion: 
+  metroPackageName: Template3D
+  metroPackageVersion: 1.0.0.0
   metroCertificatePath: 
   metroCertificatePassword: 
   metroCertificateSubject: 
@@ -830,7 +832,7 @@ PlayerSettings:
   metroCertificateNotAfter: 0000000000000000
   metroApplicationDescription: Template_3D
   wsaImages: {}
-  metroTileShortName: 
+  metroTileShortName: TestProject
   metroTileShowName: 0
   metroMediumTileShowName: 0
   metroLargeTileShowName: 0