Exchange mktemp command to be compatible with linux and macos

settings/ui/tests/acceptance/features/settings.feature

@@ -33,7 +33,6 @@ Feature: Set user specific settings
 		When the user browses to the settings page
 		And the user changes the language to "English"
 		And the user browses to the files page
-		When the user browses to the files page
 		Then the files menu should be listed in language "English"
 
 	Scenario: changing the language only affects one user

settings/ui/tests/acceptance/pageobjects/filesPageSettingsContext.js

@@ -33,7 +33,6 @@ module.exports = {
           })
         })
       await this
-        .waitForElementVisible('@userMenuBtn')
         .click('@userMenuBtn')
         .waitForElementNotVisible('@userMenuContainer')
       return menu

settings/ui/tests/run-acceptance-test.sh

@@ -23,7 +23,7 @@ trap clean_up SIGHUP SIGINT SIGTERM
 if [ -z "$TEST_INFRA_DIRECTORY" ]
 then
 	cleanup=true
-	testFolder=$(mktemp -d -p .)
+	testFolder=$(mktemp -d)
 	printf "creating folder $testFolder for Test infrastructure setup\n\n"
 	export TEST_INFRA_DIRECTORY=$testFolder/tests
 fi