fixes #14502 - fix documentation of the hosts controller for puppetclass_ids

previously it wrongly stated that the parameter is called
puppet_class_ids

Fixes #14503 - don't join reports with the logs and resources explicitly in API

Using `.includes(:logs => [:message, :source])` in the search scope
for reports caused serious performance issues (ending up with server
taking all of its memory). I've found no reason for the `includes` to...

Fixes #5816 - allow editing and displaying self via API

fixes #12746 - list compute resources from plugin definitions

Load the full list of known CRs from plugins on the fly, instead of
modifying the class-level list of supported plugins. Since plugin
definitions don't get reloaded, this allows the ComputeResource class to...

Fixes #14182 - authorize role index

Fixes #13896 - Rename Anonymous role to Default role

fixes #13828 - CVE-2016-2100 - only showing relevant bookmarks

Fixes #13554 - Setting releated to taxonomies shouldn't be shown if they are disabled

Fixes #12566 - host_parameters_attributes accepts nested flag

Fixes #7230, #12021 - Upgrade to Rails 4.1.5

This commits upgrades Rails to Rails 4.1.5. See a description of the
changes included here, and go to the pull request in GitHub to see more
detailed explanations:

• Update gems to a Rails 4 compatible version, including dependencies...