Fix locator typo in go_to_accesssecurity_page

Method is_element_visible expects locator that should consist of two
items -> missing '*'.

Partially implements blueprint: selenium-integration-testing

Change-Id: I1ec86cf37fe0e1dc4b3d68d884f60a2c04adb380
Merge "Fix locator typo in go_to_accesssecurity_page"