Expose pools and flavors in homedoc

Pools and flavors were missing from our v1.1 homedoc. This patches adds
them just when admin_mode is enabled. To do so, the falcon resource now
accepts a conf object.

Follow up patches should make all resources accept a conf object, for
the sake of consistency.

Change-Id: I6da7c8e4dedc9722858f360b074611b904c8d131
Closes-bug: #1361275
Merge "Expose pools and flavors in homedoc"