Generate acl_rules.js and rename default roles, including seed data

[asishallab]

This issue is related to # 57.

This issue also affect the graphql-skeleton-server

Rename the existing and automatically seeded roles as in the above related issue.

Use the functions implemented for the SPA code-generator that create the default acl_rules.js file and copy them into this code-generator. The goal is to provide read access to all data models to the "reader" role, "create", "update", and "delete" access on all data models to the editor role, and full "CRUD" access to the User/Role models only to the administrator role.