make service monitor clean up optional when operator is starting

theodolite/src/main/kotlin/theodolite/execution/operator/ClusterSetup.kt

@@ -3,11 +3,14 @@ package theodolite.execution.operator
 import io.fabric8.kubernetes.client.NamespacedKubernetesClient
 import io.fabric8.kubernetes.client.dsl.MixedOperation
 import io.fabric8.kubernetes.client.dsl.Resource
+import mu.KotlinLogging
 import theodolite.execution.Shutdown
 import theodolite.k8s.K8sContextFactory
 import theodolite.k8s.ResourceByLabelHandler
 import theodolite.model.crd.*
 
+private val logger = KotlinLogging.logger {}
+
 class ClusterSetup(
     private val executionCRDClient: MixedOperation<ExecutionCRD, BenchmarkExecutionList, Resource<ExecutionCRD>>,
     private val benchmarkCRDClient: MixedOperation<BenchmarkCRD, KubernetesBenchmarkList, Resource<BenchmarkCRD>>,
@@ -75,10 +78,14 @@ class ClusterSetup(
             labelName = "app.kubernetes.io/created-by",
             labelValue = "theodolite"
         )
-        resourceRemover.removeCR(
-            labelName = "app.kubernetes.io/created-by",
-            labelValue = "theodolite",
-            context = serviceMonitorContext
-        )
+        try{
+            resourceRemover.removeCR(
+                labelName = "app.kubernetes.io/created-by",
+                labelValue = "theodolite",
+                context = serviceMonitorContext
+            )
+        } catch (e: Exception) {
+            logger.warn { "Service monitors could not be cleaned up. It may be that service monitors are not registered by the Kubernetes API." }
+        }
     }
 }
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