Move plugins.d/README from the node to the broker

The /etc/openshift/plugins.d/ directory and the README file therein are
related to the broker, not the node.

This commit also modifies the spec file so that the README file is actually
shipped in the RPM.
Split the settings page from the my account page
Send all settings interactions to the settings page, and fix tests.  Add a few more tests around the settings page, specifically for new key and new domain.
WIP Cartridge Refactor - Update extended tests for raw environment variables

* Not all tests set @user.namespace
Improve console rest api memory usage by reducing copies
Merge pull request #2179 from jwhonce/wip/raw_envvar

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Merge pull request #2177 from smarterclayton/split_settings_page

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Merge pull request #2178 from smarterclayton/improve_memory_usage_of_rest_api

Merged by openshift-bot
Merge pull request #2062 from Miciah/move-plugins.d-README-from-node-to-broker

Merged by openshift-bot