fixes #4669 - HostMailer summary method refers to undefined variable

fixes #3645 - fix total value in summary mail subject

Fixes #3569, #3210 - Use port from foreman_url for templates

i18n - fixing malformed strings

fixes #3059 - new mail rake task sends foreman reports to each user

fixes #2411 - move files in /models to /concerns, /services, /mailers, /observers

fixes #2440 remove unused files, code, unnecessary require statements

WIP rails3 migration