added new service 'loginpoints'

[hauptmab]

This pull request provides the backend logic to reduce the selection of projects a user can login to. This is done by identifying projects with identical 'login background'.

For example, several projects my be loaded from the same ALM server. Logging in to one project will always lead to be logged in to all projects (multi-project login realized via connectors). Instead of focussing on projects to login, we introduce the concept of LoginPoints to login in to.

LoginPoints are generated by asking every existing connector for an unique LoginPoint string (e.g., <ALM-Type>-<ALM-Server URL>). Connectors can decide themselves what information to embedd to the LoginPoint string in order to be comparable. In case multiple connectors generate the same LoginPoint string, they can be considered as one LoginPoint group. For each LoginPoint group, it is enough to login to just one project of that group in order to be logged in to each project.

We introduced a new REST endpoint called loginpoints.
This will return pairs of

• login point names
• a (random) representative project for this login point to perform the acutal login.

Example: http://<specmate-server>/services/rest/loginpoints

{
   "Project test-data" : "test-data",
   "Jira Server https://qualicen.atlassian.net/" : "jira-cloud_SPEM",
   "Jira Server http://127.0.0.1:2990/jira" : "jiraLocalhost1_MSP"
}

[sebeder]

I think it would be cool to specify the default project in the config - or at least the project should always be the same, not random at login. Is that possible?

[sebeder]

Hi @junkerm , I assigned the review to you since @hauptmab and I contributed code and you had conceptual input to that one.