Starters for security

[hohwille]

For security we have planned a new backlog item to introduce actual starters for different authentication setups. So we should have something like oasp4j-starter-security-kerberos or oasp4j-starter-security-ldap. Each of this starters would also come with a section in the documentation how to use it. Where ever possible all needed for standard usage is to add the starter dependency and configure some properties in application.properties as e.g. for kerberos:

security.auth.kerberos.keytabLocation=...
security.auth.kerberos.servicePrincipalName=...

Extracted from #612

[hohwille]

Is there any volunteer to push this forward? Otherwise we have to postpone this issue.