Use new schema
Add chef scripts to configure geo-redundancy (by setting gr_environments in environment)
Move to memcached, permit missing ENUM servers and install snmpd
Reinstate security group rules (incorrectly committed as part of previous commit)
Fix non-geo-redundant configurations
Don't restart sprout after re-clustering (as before)
Update provisioning schema
Merge pull request #59 from Metaswitch/master_new_homestead_api_provisioning

{Reviwer: Matt} New homestead API - provisioning schema
Only specify enum_server if one is configured for this environment
Reduce TTL for cluster DNS records to 60 seconds
Ensure DNS records are updated if TTL is wrong
Merge branch 'geo_redundancy_to_merge' into geo_redundancy_to_merge_2

Conflicts:
	cookbooks/clearwater/recipes/cluster.rb
Fix merge
Merge pull request #61 from Metaswitch/geo_redundancy_to_merge_2

[Reviewer: Mike] Geo redundancy support
Reverse sense of merged attributed to a joining attribute to make upgrades of existing systems work
Merge pull request #69 from Metaswitch/issue68

[Reviewer Andy] Reverse sense of merged attributed to a joining attribute to make upgrades of existing systems work
Fix up the auto-upgrade mechanism.
Fix typo.
Merge pull request #70 from Metaswitch/autoupgrade

{Reviewer: Matt} Restore option to auto-upgrade packages
Make the provisioning schema in chef match that in the crest codebase