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

added 4 commits

• 209375ab - Structure use case infrastructe better with kustomize
• e02670c5 - Fix workload generator kubernetes yamls using string vor environment
• eead41d5 - Fix pathes for kustomize patches and calculate execution time
• f32da38c - Streamline workload generator kubernetes files using kustomize

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added 1 commit

• b4871a47 - Streamline workload generator kubernetes files using kustomize

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unmarked as a Work In Progress

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Assign @she

assigned to @she

added 1 commit

• 944e370c - Fix names of docker images for workload generators

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• c4a9fa86 - fix wrong value type in application deployment

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mentioned in issue #52 (closed)

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changed milestone to %0.3.0

added 106 commits

• c4a9fa86...65aa5fd3 - 105 commits from branch she:master
• c83d78ca - Merge branch 'master' into feature/kustomize

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resolved all threads

All in all this looks way cleaner than before. The only thing I don't really like are these parts:

cat <<EOF >uuc-workload-generator/overlay/c4-workload-generator/set_paramters.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: titan-ccp-load-generator
spec:
  replicas: "$WL_INSTANCES"
  template:
    spec:
      containers:
      - name: workload-generator
        env:
        - name: NUM_SENSORS
          value: "$NUM_SENSORS"
        - name: INSTANCES
          value: "$WL_INSTANCES"
EOF

I'm still thinking a bit about whether we could clean up the code here.