Feature/nexus user passwords

[mreiche]

Partly fixes #699

Test output:

Configuring Nexus3...
Waiting for Nexus...
Configuring anonymous access...
Anonymous access configured.
Configuring blob stores...
Configuring repositories...
Repository 'osm-maps' configured.
Configuring roles...
Role 'nx-metrics' configured.
Role 'osm-reader' configured.
Role 'osm-writer' configured.
Configuring users...
Generating random password for user 'osm-reader': 2d5d352940b34a2092dc
User 'osm-reader' configured.
User 'osm-writer' configured.
Configuring scripts...
Script 'cleanup' updated.
Script 'task' updated.
Configuring cleanup policies...
Configuring tasks...
Nexus3 configured successfully!

values.yml

  users:
    - userId: osm-writer
      firstName: OSM
      lastName: Writer
      emailAddress: "[email protected]"
      status: active
      roles:
        - osm-writer
      password: katze
    - userId: osm-reader
      firstName: OSM
      lastName: Reader
      emailAddress: "[email protected]"
      status: active
      roles:
        - osm-reader

[stevehipwell]

Thanks for the PR, but I'd rather implement this myself. For example password should have secret and key child values.