Add cinder support

* using the new functional pattern: cinder_XXX functions are in
  lib/cinder
* enable with 'c-api,c-sch,c-vol' in ENABLED_SERVICES, n-vol is still the default
* exercises/volumes.sh runs for cinder and n-vol
* move config to /etc/cinder
* change volume_group to stack-volumes; this also renames the backing file
  to /opt/stack/data/stack-volumes-backing-file.
* removes osapi_volume from nova.conf enabled_apis
* integrates cinder + keystone
* launches c-sch
* tweaks for multi node
* move enabled_apis substitution to init_cinder

18Jun2010
* restored & rebased
* update setup.py to use setup_develop() in lib/cinder

Change-Id: I1e1aa4387031c56e4fa239eb73bea2af8cef0e38
diff --git a/exercises/euca.sh b/exercises/euca.sh
index 76e5202..4a538c6 100755
--- a/exercises/euca.sh
+++ b/exercises/euca.sh
@@ -24,6 +24,9 @@
 # Keep track of the current directory
 EXERCISE_DIR=$(cd $(dirname "$0") && pwd)
 TOP_DIR=$(cd $EXERCISE_DIR/..; pwd)
+VOLUME_ZONE=cinder
+VOLUME_SIZE=1
+ATTACH_DEVICE=/dev/vdc
 
 # Import common functions
 source $TOP_DIR/functions