Add a per system run autoheal button

Added a button on Subscriptions Pane of Systems Page to attach
subscriptions to a single system.
Changes to make katello run on Ruby 2.0
987909 - Org names rendered as HTML

making sure ORG name is escaped if it has HTML characters in its name.

this includes changes to jeditable's default text.content function and a
quick substitution of characters in displayed notices
actkeys-filter - properly filter available subscriptions

1. Show Red Hat subscriptions w/ no provided products
2. Show Red Hat subscriptions w/ promoted content in the CV
3. Show custom subscriptions w/ promoted content in the CV

actkeys-filter - comment out spec test
Merge pull request #2682 from thomasmckay/actkeys-filter

actkeys-filter - properly filter available subscriptions
Merge pull request #2680 from komidore64/org-html

987909 - Org names rendered as HTML
Merge pull request #2671 from pgodhani/heal_single_system

Add a per system run autoheal button
Merge pull request #2676 from parthaa/2.0-changes

Changes to make katello run on Ruby 2.0
tests - adding default namespace to keep some tests from running twice

previously rake minitest:glue  and rake minitest:lib would run the tests twice
putting non-glue stuff in the default namespace prevents this
Merge pull request #2632 from jlsherrill/default_namespace

tests - adding default namespace to keep some tests from running twice