fixes #1764 changing per_page setting would update only after a restart

this commit changes it back to an area in the code which gets evaluated
everytime instead of upon startup only

fixes #1729 safer migration code.

fixes #1700 audit page performance improved

• Added auditabale name and associated name columns.
• Added username to audit table

don't allow to delete a provisioning template when its assigned to an OS default template

fixes #1676 have memory size use factors of 1024

fixes #1656 add support for systems with terabytes of memory

code smell

Fixes #944 - clear network conflicts

When a network conflict is detected (such as conflicting ip/name dns or
dhcp records), foreman would try to suggest a resolution.

Signed-off-by: Paul Kelly <paul.ian.kelly@googlemail.com>

Revert "Fixes #944 - clear network conflicts"

This reverts commit 117ba92a758e4589ef5fdf1f1b9083402b2d317b.

Fixes #944 - clear network conflicts

When a network conflict is detected (such as conflicting ip/name dns or
dhcp records), foreman would try to suggest a resolution.

Signed-off-by: Paul Kelly <paul.ian.kelly@googlemail.com>

WIP rails3 migration

fixes #1166 - be more liberal in accepted values for to_gb - add better logging message

Signed-off-by: Tim Speetjens <tim.speetjens@gmail.com>

fixes #685 - records per page should be configurable

This patch adds a new setting how many records should be per page.

note that since the code is in the ActiveRecord::Base class, and that
its in lib (e.g. loaded once) you would need to restart foreman everytime you change this value....

fixes #1050 - Foreman settings should not be viewed/edited by non admin user

fixes #777 - this enable auditing of when a host is changing its puppet class assignmetns

one limitation of this patch is that at the moment, each class change
gets its own audit record.