Add glance client

* python-glanceclient overrides the old client shipped with glance in /usr/local/bin
* start adding exercises

Change-Id: I460ed5749bca69425f23d328c0537c2ef91f84a4
diff --git a/exercises/volumes.sh b/exercises/volumes.sh
index 1abbecc..b62427f 100755
--- a/exercises/volumes.sh
+++ b/exercises/volumes.sh
@@ -53,10 +53,10 @@
 nova image-list
 
 # But we recommend using glance directly
-glance -f index
+glance image-list
 
 # Grab the id of the image to launch
-IMAGE=`glance -f index | egrep $DEFAULT_IMAGE_NAME | head -1 | cut -d" " -f1`
+IMAGE=$(glance image-list | egrep " $DEFAULT_IMAGE_NAME " | get_field 1)
 
 # determinine instance type
 # -------------------------