Improve support for JDK6

gradle.properties

@@ -3,7 +3,7 @@ junit5Version=5.6.0
 testContainersVersion=1.15.1
 
 GROUP=de.justjanne
-VERSION_NAME=1.1.0
+VERSION_NAME=1.2.0
 POM_ARTIFACT_ID=testcontainers-ci
 POM_NAME=testcontainers-ci
 POM_DESCRIPTION=Wrapper for Testcontainers in Gitlab CI to use provided containers

src/main/kotlin/de/justjanne/testcontainersci/extension/CiContainersExtension.kt

@@ -23,7 +23,7 @@ class CiContainersExtension : BeforeEachCallback, AfterEachCallback {
     context?.requiredTestInstances?.allInstances?.forEach { instance ->
       instance.javaClass.declaredFields.map { field ->
         if (field.type == ProvidedContainer::class.java) {
-          field.trySetAccessible()
+          field.isAccessible = true
           containers.add(field.get(instance) as ProvidedContainer)
         }
       }