Add opentelemetry tracing

Add opentelemetry tracing

- enhance the Dockerfile to configure the opentelemetry java agent
- the otel agent can be configured via environment variables [1][2]

[1] [Environment Variable Specification](https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/)
[2] [Exporter Environment Variables](https://opentelemetry.io/docs/specs/otel/protocol/exporter/#configuration-options)

Issue-ID: SDNC-1859
Change-Id: Ie80d352bfc664bfbdd9d06b031fcb03af375b824
Signed-off-by: Fiete Ostkamp <fiete.ostkamp@telekom.de>