Fixes #10782 - global host status

• OK
• WARN
• ERROR

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

Fixes #10487: Add custom logging support

This change moves away from the Rails logger to the 'logging' gem
to support more configurability of logging. Further, this allows for
the creation of custom loggers that plugins can then create during
registration (with `logger`) or through settings....

fixes #9873 - generate unique alert mails for each user group member

To create distinct mails, new Mailer instances are required instead of using
the same one - else, the last message changes the previous ones. The recipient
list is now determined in the ReportImporter, and the MailNotification helps...

Refs #3809 - Remove cops for empty lines

fixes #8484 - make SmartProxyAuth concern more useful to plugins

fixes #7586, #7734, #7172 - user preferences for receiving mail notifications

Adds a framework for user-selectable mail notifications. The work is
still done in ActionMailer classes and launch by rake in cron, however a
wrapper called MailNotification is used to provide RBAC and make the...

fixes #3205 - Extract and refactor report importing logic

This patch extracts all report importing logic into seperate importer and status classes.
long term this could allow:

1. aliases methods for async operations
2. different types of reports imports (based on reporting type).