Provide a REST API for retrieving License Details

Summary

At the moment, License Details endpoint is not elaborate enough:

/rest/license/1.0/license

Suggestion

Create an API for this so that Admins are able to retrieve information such as
"valid"
"evaluation"
"maximumNumberOfUsers"
"licenseType"
"creationDateString"
"expiryDate"
"expiryDateString"
"organizationName"
"dataCenter"
"subscription"
"rawLicense"
"maintenanceExpired"
"enterprise"
"active"
"autoRenewal"

Note

In JIRA: https://confluence.atlassian.com/jirakb/how-to-retrieve-application-license-details-via-rest-api-in-jira-7+-934728265.html