fix (tests-suite): increase the timeouts of FirmwareInstallerTestbed.…

…InstallAsync.ShouldThrowFirmwareInstallationTimeoutException_GivenTooSmallTimeout()

   this was done to deal with phantom test-failures that are probably caused by the fact that the new event-firing
   mechanism takes a bit too long to initialize the first time it gets involved

Laerdal.McuMgr.Tests/FirmwareInstaller/FirmwareInstallerTestbed.InstallAsync.ShouldThrowFirmwareInstallationTimeoutException_GivenTooSmallTimeout.cs

@@ -26,7 +26,7 @@ public async Task InstallAsync_ShouldThrowFirmwareInstallationTimeoutException_G
                 hostDeviceModel: "foobar",
                 hostDeviceManufacturer: "acme corp.",
 
-                timeoutInMs: 100,
+                timeoutInMs: 500,
                 maxTriesCount: 1
             ));
 
@@ -88,7 +88,7 @@ public override EFirmwareInstallationVerdict BeginInstallation(
                     await Task.Delay(10);
                     StateChangedAdvertisement(oldState: EFirmwareInstallationState.Idle, newState: EFirmwareInstallationState.Uploading);
 
-                    await Task.Delay(1_000);
+                    await Task.Delay(2_000);
                     StateChangedAdvertisement(oldState: EFirmwareInstallationState.Uploading, newState: EFirmwareInstallationState.Complete);
                 });