Make the analysis of experiments more flexible

• Allow arbitrary prometheus range queres (update prometheusResponse)
• Allow usage of more than one slo checker
• Update the json which send to the python slo checker
• refactoring
• Update CRDs in order to set the query string as an dedicated parameter for a slo checker
• Update exisiting python slo checker in order to use the new JSON format (handled in !185 (merged))

Closes #249 (closed)

helm/jmx-custom-map.yaml

-apiVersion: v1
-data:
-  jmx-kafka-prometheus.yml: |
-    jmxUrl: service:jmx:rmi:///jndi/rmi://localhost:5555/jmxrmi
-    lowercaseOutputName: true
-    lowercaseOutputLabelNames: true
-    ssl: false
-kind: ConfigMap
-metadata:
-  name: theodolite-cp-kafka-jmx-configmap
-  namespace: default