Add initial Service model

Has references to up coming repositories, deployments and instances.

Generated with Rails command:
rails g model Service name:string group:string jira:string \
confluence:string
Added Repository model

Generated with Rails command:
rails g model Repository description:string url:string \
service:belongs_to
Generated Deployment model

Generated with Rails command:
rails g model Deployment name:string description:string url:string \
service:belongs_to
Generate Instance model

This has children endpoints.

Generated with Rails command:
rails g model Instance name:string version_of_artifact:string \
description:string service:belongs_to
Generate Endpoint model

Belongs to Instance.

Generated with Rails command:
rails g model Endpoint name:string description:string \
endpoint_type:string url:string instance:belongs_to
Fix up associations

For some reason endpoints ended up being belongs_to in instances.
Service needs has_many with its children.
Generate schema from rake db:migrate

This schema looks more or less correct to me
Create CV service DB seeds using all the model

This represents the current state of the CV service.
Merge pull request #2 from amaltson/generate-models

Generate models