Rename admin_status_up to admin_state_up

This patch renames all instances of admin_status_up to admin_state_up since
that is the correct name. There was also one instances of this for NVP which
was renamed to admin_status_enabled since that is what the name is in NVP.

Fixes bug 1126966

Change-Id: Ie74bc411082cb2de4d83b947df1f248facbd0d16