clean up ubuntu versions

oneiric is long dead, remove references to it whenever possible
(one more subtle issue in cinder should be a seperate patch). This
includes removing the oneiric only tool build_uec.sh.

also remove the bulk of references to quantal, which is 8 months
out of support. note: raring only has support for the rest of the
month.

Change-Id: Ib17502be7572af76dc95560615221b48b970a547
diff --git a/files/apts/neutron b/files/apts/neutron
index 0f4b69f..5760113 100644
--- a/files/apts/neutron
+++ b/files/apts/neutron
@@ -18,7 +18,7 @@
 python-pyudev
 python-qpid # dist:precise
 dnsmasq-base
-dnsmasq-utils # for dhcp_release only available in dist:oneiric,precise,quantal
+dnsmasq-utils # for dhcp_release only available in dist:precise
 rabbitmq-server # NOPRIME
 qpid # NOPRIME
 sqlite3