Partially fixed IntelliJ warnings (#361)

Partially addressing #361 and fixed more straight-forward IntelliJ warnings.

theodolite/src/test/kotlin/theodolite/execution/operator/ControllerTest.kt

@@ -2,6 +2,7 @@ package theodolite.execution.operator
 
 import com.google.gson.Gson
 import com.google.gson.GsonBuilder
+import groovy.transform.SourceURI
 import io.fabric8.kubernetes.client.CustomResourceList
 import io.fabric8.kubernetes.client.server.mock.KubernetesServer
 import io.quarkus.test.junit.QuarkusTest
@@ -115,6 +116,7 @@ class ControllerTest {
             .getDeclaredMethod("getBenchmarks")
         method.isAccessible = true
 
+        @Suppress("UNCHECKED_CAST")
         val result = method.invoke(controller) as List<BenchmarkCRD>
 
         assertEquals(2, result.size)