MOBILE-4239 behat: Skip flaky tests in jenkins

Author: NoelDeMartin

src/addons/mod/glossary/tests/behat/navigation.feature

@@ -200,6 +200,7 @@ Feature: Test glossary navigation
     When I swipe to the left in the app
     Then I should find "Acerola is a fruit" in the app
 
+  @ci_jenkins_skip
   Scenario: Tablet navigation on glossary
     Given I entered the course "Course 1" as "student1" in the app
     And I change viewport size to "1200x640"