Replace Kubernetes YAML sed-replacements by Kustomize

Closes #17 (closed)

Change infrastructure of Kubernetes files for the uc applications and workload generators. The new structure is:
--uc-application
---- base
---- overlay
-------uc1-application
-------uc2-application

Also use Kustomize for building the files for deployment

execution/uc1-application/aggregation-deployment.yaml

@@ -23,13 +23,13 @@ spec:
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
         - name: COMMIT_INTERVAL_MS
-          value: "{{KAFKA_STREAMS_COMMIT_INTERVAL_MS}}"
+          value: 100
         - name: JAVA_OPTS
           value: "-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=5555"
         resources:
           limits:
-            memory: "{{MEMORY_LIMIT}}"
-            cpu: "{{CPU_LIMIT}}"
+            memory: 4Gi
+            cpu: 1000m
       - name: prometheus-jmx-exporter
         image: "solsson/kafka-prometheus-jmx-exporter@sha256:6f82e2b0464f50da8104acd7363fb9b995001ddff77d248379f8788e78946143"
         command:
@@ -50,4 +50,4 @@ spec:
       volumes:
         - name: jmx-config
           configMap:
-            name: aggregation-jmx-configmap
\ No newline at end of file
+            name: aggregation-jmx-configmap