Pass the proper user_id when setting up xprofile meta boxes on the Community Profile Dashboard panel

The default value, bp_displayed_user_id(), is not defined at this point, so we
must manually pass the $user_id.

Fixes #5809

Props Offereins

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8823 cdf35c40-ae34-48e0-9cc9-0c9da1808c22