Fixes #12718 - smart proxy log table

This patch adds a table with logs fetched from Smart Proxy /logs new API. It
returns latest N log entries from a simple memory buffer. The table supports
filtering by level, custom filtering and it introduces several overview...

Fixes #12506 - Show smart proxies version in about page

Fixes #11643 - [API] Add preview template to host

Fixes #7537 - Adds test connection button to LDAP form

fixes #4151 - enable reports STI

Permits subclassing of ReportImporter and Report to import and store
new types of reports associated to hosts.

Fixes #11818 - Update match routes to get

Some of our routes use match when they really mean just 'get'. Rails 4
forces us to choose a verb, and we can do this already on Rails 3.

Fixes #2267 - general rebuild of TFTP, DNS, DHCP

Fixes #3650, #11600 - Compute Resource availability_zones, flavors, security_groups API v2 endpoints

Fixes #11693 - removed 'destroy' for smart class parameter from API controllers

Fixes #10782 - global host status

• OK
• WARN
• ERROR

Plugins can add their own substatuses. These are automatically...