Fix 2-org dev env issues

Fix some small issues in local 2-organization dev enviromment:

• API calls fetch very slowly
• url for organization-b in readme
• more explicitly documented login credentials
• Login page shows unauthorized request to http://management.organization-b.nlx.local:3011/oidc/me (also organization-a)
  Only happens when not logged in, was already like this before 2-org env.
• NPM shows error:
  [HPM] Error occurred while trying to proxy request /oidc/me from management.organization-a.nlx.local:3011 to http://management-api.organization-a.nlx.local:7912 (ECONNRESET) (https://nodejs.org/api/errors.html#errors_common_system_errors)