refactored sys_parameters view
created tests for oauth tokens and clients

I have created system tests for oauth cliens and tokens. They
include actions such as adding, editting, modifying in the user's
profile, and deleting from the user's profile.

I have removed the sys_parameters delete view which is no longer used.
refactored/fixed survey groups index

I have slightly refactored survey groups index to have a link
to the view/edit survey groups action in the title column.

I have also removed the commented out line that closes the browser
at the end of tests for oauthToken.