[infra-proxy-service] Add environments & expanded_run_lists attributes in Roles API

[kvivek1115]

🔩 Description: What code changed, and why?

• Add description, environments attributes in Roles list API.
• Add default_attributes, override_attributes and expanded_run_list attributes in role detail API.
• Implement required helpers to recursively find the runlist roles and expand those runlist as children.

⛓️ Related Resources

#1544
Mock UI Ref:

👍 Definition of Done

• GetRoles API now returns name, description, and environments.
• GetRole detail API now also returns default_attributes, override_attributes and expanded_run_list.

👟 How to Build and Test the Change

Steps to build:

• rebuild components/infra-proxy-service
• rebuild components/automate-gateway

Steps to test:

• Add required credentials e.g. test chef infra server env.

gPRC GetRoles API:

chef-automate dev grpcurl automate-gateway chef.automate.api.infra_proxy.InfraProxy.GetRole -- -d '{"server_id": "SERVER_ID", "org_id": "ORG_ID"}'

HTTP GetRoles API:

curl -sSkH "api-token: $TOK" https://a2-dev.test/api/v0/infra/servers/SERVER_ID/orgs/ORG_ID/roles

Response:

{"roles":[{"name":"starter","description":"An example Chef role","environments":["_default"]},{"name":"web_server","description":"A role to configure our front-line web servers","environments":["_default","production","testing"]}]}

gPRC GetRole API:

chef-automate dev grpcurl automate-gateway chef.automate.api.infra_proxy.InfraProxy.GetRole -- -d '{"server_id": "SERVER_ID", "org_id": "ORG_ID", "name":"ROLE_NAME"}'

HTTP GetRole API:

curl -sSkH "api-token: $TOK" https://a2-dev.test/api/v0/infra/servers/SERVER_ID/orgs/ORG_ID/roles/ROLE_NAME

Response:

{"name":"web_server","chef_type":"role","description":"A role to configure our front-line web servers","default_attributes":"{\"nginx\":{\"log_location\":\"/var/log/nginx.log\"}}","override_attributes":"{\"nginx\":{\"gzip\":\"on\"}}","json_class":"Chef::Role","run_list":["recipe[apt]","recipe[nginx]"],"expanded_run_list":[{"id":"_default","run_list":[{"type":"recipe","name":"apt","version":"","skipped":false,"children":[]},{"type":"recipe","name":"nginx","version":"","skipped":false,"children":[]}]},{"id":"production","run_list":[{"type":"recipe","name":"nginx::config_prod","version":"","skipped":false,"children":[]}]},{"id":"testing","run_list":[{"type":"recipe","name":"nginx::config_test","version":"","skipped":false,"children":[]}]}]}

✅ Checklist

• I have read the CONTRIBUTING document.
• Tests added/updated?
• Docs added/updated?
• All commits have been signed-off for the Developer Certification of Origin.

📷 Screenshots, if applicable

[kvivek1115]

Updated the go-chef lib to pull the latest changes and apply make revendor

[kvivek1115]

Observed minor cleanup to skip else if if have return statements.