Add thin-provisioning-tools for Cinder

Ubuntu's LVM packaging does not support thin provisioning by
default:
 /usr/sbin/thin_check: execvp failed: No such file or directory
This is fixed with install of thin-provisioning-tools.

Change-Id: I31f572934ea94cae6e2aea27a2c731ee5bca68d3
Closes-Bug: #1615134
diff --git a/files/debs/cinder b/files/debs/cinder
index 3595e01..c1b79fd 100644
--- a/files/debs/cinder
+++ b/files/debs/cinder
@@ -3,3 +3,4 @@
 open-iscsi-utils # Deprecated since quantal dist:precise
 qemu-utils
 tgt # NOPRIME
+thin-provisioning-tools