Bug 1440908: Fixing problem with friend_request.feature

Was trying to access 'Pete Mc' but the link for first and last name
are separate on the admin/users/search.php page so we need to just
look for the first name 

Change-Id: I42778395f8c1b77cf2bb40333c1d3fd935802ecb
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>

test/behat/features/account/friend_request.feature

@@ -13,7 +13,7 @@ Scenario: Sending friend requests from student to admin (Bug 1440908)
 Given I log in as "admin" with password "Password1"
 And I follow "Administration"
 And I choose "User search" in "Users"
-And I follow "Pete Mc"
+And I follow "Pete"
 And I follow "Log in as userA"
 And I follow "Admin User"
 And I follow "Request friendship"