Draft: Add Spark Structured Streaming based Benchmarks

This merge request includes Spark Structured Streaming benchmarks for use-cases 1 to 3. Furthermore, all necessary resources for execution with Theodolite on a Kubernetes cluster are included.

theodolite-benchmarks/definitions/uc1-spark/resources/master-deployment.yaml

@@ -22,6 +22,8 @@ spec:
           env:
             - name: SPARK_MODE
               value: "master"
+            - name: SPARK_MASTER_PORT
+              value: "7077"
             - name: SPARK_RPC_AUTHENTICATION_ENABLED
               value: "no"
             - name: SPARK_RPC_ENCRYPTION_ENABLED