Description of problem:

Subscriptions allocation is not optimal afeter renewal event (or manifest change). 

Example:

1) Customer has 3 RH0103708 subscriptions (Red Hat Enterprise Linux
Server, Premium (8 sockets) (Up to 4 guests)

2) Customer has 3 physical systems, one of them is running virtual
guest. All of them are covered with subscriptions (physical systems use
RH0103708 subscriptions, virtual guest is covered by special 'inherited'
guest subscription)

3) Renewal event is happening. New manifest is being uploaded and
'refresh' is being performed.

4) Virtual system comes first and grabs subscription for physical system
(instead of special 'inherited' one for virtual guest)

5) Now one of physical systems (in worst scenario - host system for the
virtual guest) is not covered by a subscription. Only manual action like
detach from virtual, attach to physical, auto-attach virtual will help.

I believe we have a whole class of such issues. E.g. if we have
2 subscription - one RHEL 1-2 sockets and the other up to 4 sockets and
two systems with 2 and 4 sockets the system with 2 sockets can grab
4-socket subscription and 4-socket system won't be covered.

Version-Release number of selected component (if applicable):
# rpm -qa | grep -P 'katello|candlepin'
katello-glue-elasticsearch-1.4.3-5.el6sam_splice.noarch
candlepin-scl-rhino-1.7R3-1.el6_4.noarch
katello-cli-common-1.4.3-4.el6sat.noarch
katello-headpin-all-1.4.3-5.el6sam_splice.noarch
katello-candlepin-cert-key-pair-1.0-1.noarch
katello-cli-1.4.3-4.el6sat.noarch
signo-katello-0.0.10-2.el6sat.noarch
katello-glue-candlepin-1.4.3-5.el6sam_splice.noarch
candlepin-0.8.19-1.el6sam.noarch
candlepin-scl-runtime-1-5.el6_4.noarch
candlepin-scl-1-5.el6_4.noarch
katello-common-1.4.3-5.el6sam_splice.noarch
katello-headpin-1.4.3-5.el6sam_splice.noarch
candlepin-selinux-0.8.19-1.el6sam.noarch
candlepin-tomcat6-0.8.19-1.el6sam.noarch
katello-configure-1.4.4-2.el6sat.noarch
katello-selinux-1.4.4-2.el6sat.noarch
candlepin-scl-quartz-2.1.5-5.el6_4.noarch
katello-certs-tools-1.4.2-2.el6sat.noarch