Add integration tests

[bjrne]

• As a user_a, I want to successfully complete the login page, visit my profile, edit my profile and log out.
• As a user_a, I want to successfully log in to the website, change my password and successfully log out and in again.
• As a user_a, I want to successfully reset my password without knowing it.
• As a user_b, I want to successfully complete the login page, search for user_a's via the map and contact 2 user_a's matching some filter with a zipcode that is not mine and a 1000km radius.
• As a staff user, I want to successfully approve type a and b users.
• As a staff user, I want to view access and usage statistics.
• As a staff user, I want to change a text label in the cms and see the updated page online.
• As an intermediate staff user, I want to give other staff users permissions for approving users.
• As an interested person without an account, I want to be able to open all static pages in order to inform myself. (about, imprint, home, data agreement, possibly press)

Feel free to add more ideas :)