Handle shutdown

Adds a Shutdown Hook. Uses parsed configurations to build a deployment and to tear it down. Be aware of Gradle: Control + C kills the gradle client before the execution of the hook and therefore cant be used to test this. To test this you need to start the build application (by java -jar, etc...). Additionally for this you have to change the paths in the TheodoliteYamlExecutor and the KubernetesBenchmark

TODOS:

• Depends on merging evaluation first
• Ask if and how the Kafka lag export should be resettet
• moved to #184 (closed)
• move path from KubenetesBenchmark toplevel moved to #185 (closed)
• merge upstream theodolite-kotlin

theodolite-quarkus/src/main/kotlin/theodolite/k8s/K8sCustomResourceWrapper.kt

+package theodolite.k8s
+
+import io.fabric8.kubernetes.client.CustomResource
+import io.fabric8.kubernetes.client.NamespacedKubernetesClient
+import io.fabric8.kubernetes.client.dsl.base.CustomResourceDefinitionContext
+
+/**
+* Fabric8 handles custom resources as plain HashMaps. These need to be handled differently than normal
+* Kubernetes resources.  The K8sCustomResourceWrapper class provides a wrapper to deploy and delete
+* custom resources in a uniform way.
+*
+* @property map custom resource as plain hashmap
+* @constructor Create empty K8s custom resource wrapper
+*/
+class K8sCustomResourceWrapper(private val map : Map<String,String>) : CustomResource() {
+
+
+    /**
+     * Deploy a custom resource
+     *
+     * @param client a namespaced Kubernetes client which are used to deploy the CR object.
+     */
+    fun deploy(client : NamespacedKubernetesClient){
+        val kind = this.map["kind"]
+        // Search the CustomResourceDefinition to which the CR Object belongs.
+        // This should be exactly one if the CRD is registered for Kubernetes, zero otherwise.
+        val crds = client.apiextensions().v1beta1().customResourceDefinitions().list()
+        crds.items
+            .filter { crd -> crd.toString().contains("kind=$kind") }
+            .map { crd -> CustomResourceDefinitionContext.fromCrd(crd) }
+            .forEach { context ->
+                client.customResource(context).createOrReplace(client.configuration.namespace,this.map as Map<String, Any>)
+            }
+    }
+
+    /**
+     * Delete a custom resource
+     *
+     * @param client a namespaced Kubernetes client which are used to delete the CR object.
+     */
+    fun delete(client : NamespacedKubernetesClient){
+        val kind = this.map["kind"]
+        val metadata = this.map["metadata"] as HashMap<String,String>
+        val name = metadata["name"]
+
+        val crds = client.apiextensions().v1beta1().customResourceDefinitions().list()
+        crds.items
+            .filter { crd -> crd.toString().contains("kind=$kind") }
+            .map { crd -> CustomResourceDefinitionContext.fromCrd(crd)   }
+            .forEach { context ->
+                client.customResource(context).delete(client.configuration.namespace,name) }
+    }
+
+}
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