[Ubuntu] Invoke chromium test after installation (#2640)

* Add test invocation

* ge instead of gt

* change condition

images/linux/scripts/helpers/Tests.Helpers.psm1

@@ -36,7 +36,7 @@ function Invoke-PesterTests {
     $ErrorActionPreference = $backupErrorActionPreference
 
     # Fail in case if no tests are run
-    if (-not ($results -and ($results.FailedCount -eq 0) -and ($results.PassedCount -gt 0))) {
+    if (-not ($results -and ($results.FailedCount -eq 0) -and (($results.PassedCount + $results.SkippedCount) -gt 0))) {
         $results
         throw "Test run has failed"
     }

images/linux/scripts/installers/basic.sh

@@ -13,3 +13,4 @@ for package in $common_packages $cmd_packages; do
 done
 
 invoke_tests "Apt"
+invoke_tests "Browsers" "Chromium"