Add organization and location to foreman.

This feature allows foreman to provide multi location, multi tenant and
multi organizations capablities.

the idea is that resources within foreman (e.g. hosts, subnets, users,
environments etc) can belong to one or more locations and organization,...

Fixes #983 - implement 3 state boot

fixes wrong method name, #refs 1957

fixed wrong old hypervisor migration refs #1957

fixes #1957 - remove old libvirt hypervisors code

Since foreman 1.0 libvirt hypervisors are now part of compute resources
this patch removes the old code and migrate any existing hypervisors to
be libvirt based compute resources.

fixed typo - "replay_address" should be called "reply_address"

added migration for typo in replay_adress variable

fixes #1550 : Test existance before removing index and column.

In case where reference_id exist, but domain_id, hostgroup_id, domain_id don't, migration should'nt fail

Fixes #1911 - removes limit from change_column's in a few migrations

refs #1906 - checked in wrong migration file

feature #1906 add Trend information

Signed-off-by: Amos Benari <abenari@redhat.com>
Signed-off-by: Ohad Levy <ohadlevy@gmail.com>