[PORTALNG] 14.1.0 release

[PORTALNG] 14.1.0 release

- fix missing roles in the keycloak userinfo response
- change bff client authentication flow to service account
  to resolve exception for user management
- update bff image (0.1.2 -> 0.2.0)
- update preferences image (0.2.1 -> 0.3.0)
- update history image (0.2.1 -> 0.3.0)
- adjust COLLECTOR_HOST env variable to include
  a http:// prefix
- introduce startup probes to allow pods to come up as
  early as possible (instead of waiting 20 to 30 seconds
  depending on the initialDelaySeconds)

Issue-ID: PORTALNG-157
Change-Id: Ia0b773c37f44cb76d25f8fa214e040125805bf13
Signed-off-by: Fiete Ostkamp <Fiete.Ostkamp@telekom.de>