Introduce new Benchmark class and Patcher

This MR covers most of #151 (closed)

In detail, it includes:

• Introduction of the new benchmark and patcher types defined in #151 (closed), closes #142 (closed)
• Refactoring of many components, e.g. the K8s manager according to #151 (closed), closes #143 (closed)
• Allow setting arbitrary environment parameters, close mostly #98 (closed)
• Load configuration based on two YAML files, this closes the first part of #137 (closed)
• Allow to set Kafka and Zookeeper service names, closes #122 (closed)
• Usage of the new Workload Generator, closes #157 (closed)

TODOs before ready to merge:

• Remove hard coded parts, e.g. type of instances and loads, which is not actually loaded by configuration, see Resource and LoadDimension class in kotlin.
• Change ("patching") methods from the Kubernetes managers to actual patchers to fully resolve #143 (closed)
• Test everything inside Kubernetes.
• Clean up, remove old classes and benchmark types
• Add a NodeSelector Patcher to resolve #93 (closed)
• Maybe we need more Patchers to fully resolve #98 (closed), if more of the non environment parameters (such as K8s ResourceLimits, K8s Labels, ..) must be configurable (@she ?)
• Make namespace configurable moved to #155 (closed)

Feel free to expand this description and add TODOs

theodolite-quarkus/src/main/kotlin/theodolite/patcher/ResourceLimitPatcher.kt

 package theodolite.patcher
 
+import io.fabric8.kubernetes.api.model.Container
 import io.fabric8.kubernetes.api.model.KubernetesResource
 import io.fabric8.kubernetes.api.model.Quantity
 import io.fabric8.kubernetes.api.model.ResourceRequirements
 import io.fabric8.kubernetes.api.model.apps.Deployment
-import javax.validation.constraints.Null
+import io.fabric8.kubernetes.api.model.apps.StatefulSet
+import java.lang.IllegalArgumentException
 
 class ResourceLimitPatcher(
     private val k8sResource: KubernetesResource,
@@ -13,25 +15,39 @@ class ResourceLimitPatcher(
 ) : AbstractPatcher(k8sResource, container, limitedResource) {
 
     override fun <String> patch(value: String) {
-        if (k8sResource is Deployment) {
-            k8sResource.spec.template.spec.containers.filter { it.name == container }.forEach {
-                when {
-                    it.resources == null -> {
-                        val resource = ResourceRequirements()
-                        resource.limits = mapOf(limitedResource to Quantity(value as kotlin.String))
-                        it.resources = resource
-                    }
-                    it.resources.limits.isEmpty() -> {
-                        it.resources.limits = mapOf(limitedResource to Quantity(value as kotlin.String))
-                    }
-                    else -> {
-                        val values = mutableMapOf<kotlin.String, Quantity>()
-                        it.resources.limits.forEach { entry -> values[entry.key] = entry.value }
-                        values[limitedResource] = Quantity(value as kotlin.String)
-                        it.resources.limits = values
-                    }
+        when (k8sResource) {
+            is Deployment -> {
+                k8sResource.spec.template.spec.containers.filter { it.name == container }.forEach {
+                    setLimits(it, value as kotlin.String)
                 }
             }
+            is StatefulSet -> {
+                k8sResource.spec.template.spec.containers.filter { it.name == container }.forEach {
+                    setLimits(it, value as kotlin.String)
+                }
+            }
+            else -> {
+                throw IllegalArgumentException("ResourceLimitPatcher not applicable for $k8sResource")
+            }
+        }
+    }
+
+    private fun setLimits(container: Container, value: String) {
+        when {
+            container.resources == null -> {
+                val resource = ResourceRequirements()
+                resource.limits = mapOf(limitedResource to Quantity(value))
+                container.resources = resource
+            }
+            container.resources.limits.isEmpty() -> {
+                container.resources.limits = mapOf(limitedResource to Quantity(value))
+            }
+            else -> {
+                val values = mutableMapOf<String, Quantity>()
+                container.resources.limits.forEach { entry -> values[entry.key] = entry.value }
+                values[limitedResource] = Quantity(value)
+                container.resources.limits = values
+            }
         }
     }
 }