Bug 1529739: Allow group/institution pages to show on 'shared with me'

The check to exclude current user from results was checking wrong and
forcing the group/institution pages to be ignored as well.

behatnotneeded

Change-Id: Id1566b0ad202e667b8c68294967bc6bc99220659
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>