Install script updates

- Apply sysctl settings after configuring
- Support setting gear_profile name
- Restart Services and run oo-diagnostics after install
- add post_deploy action
- move run_diagnostics action to post_deploy
- support for configuring districts
- Update valid gear sizes on broker in post_deploy
- Fix register host dns, other cleanup
- Improve output to be parsed by oo-install
<oo-install>Support for gear profiles/districts

- Add restart_services to configure steps for a host
- add post_deploy step for broker/nodes
- Initial support for setting gear_profile
- add support for valid gear sizes and district mappings
- Run host dns configuration every time installer is run
- make URLs configurable based on version
<oo-install> bugfixes

- Fix setting of OPENSHIFT_VERSION in Rakefile
- Prompt for district/node questions when adding the node role to an
  existing host.
- prevent nil from being added to the list of gear sizes
- only ask district/node questions if context is :ose
- Set ose-2.1 as the default for the ose context
ensure openshift-facts are updated after restarting services
reorder restart_services step
<oo-install>Update openshift.sh for testing