Add Kubernetes benchmark definitions for Beam Implementations

After merge of !187 (merged) only #278 (closed) and this are needed for experiments.

Provide Kubernetes benchmark definitions for the following:

• Beam-FLINK
  • UC1
  • UC2
  • UC3
  • UC4
• Beam-SAMZA
  • UC1
  • UC2
  • UC3
  • UC4