Spock Testcontainers annotation is now inherited (#4053)

Author: tlefevre

modules/spock/src/main/groovy/org/testcontainers/spock/Testcontainers.groovy

@@ -3,13 +3,15 @@ package org.testcontainers.spock
 import org.spockframework.runtime.extension.ExtensionAnnotation
 
 import java.lang.annotation.ElementType
+import java.lang.annotation.Inherited
 import java.lang.annotation.Retention
 import java.lang.annotation.RetentionPolicy
 import java.lang.annotation.Target
 
+@Inherited
 @Retention(RetentionPolicy.RUNTIME)
 @Target([ElementType.TYPE, ElementType.METHOD])
 @ExtensionAnnotation(TestcontainersExtension)
 @interface Testcontainers {
 
-}
+}

modules/spock/src/test/groovy/org/testcontainers/spock/TestHierarchyIT.groovy

@@ -4,9 +4,9 @@ import org.testcontainers.containers.PostgreSQLContainer
 import spock.lang.Shared
 
 /**
- * This test verifies that integration tests can subclass each other
+ * This test verifies that integration tests can subclass each other.
+ * Also verifies that the @Testcontainers annotation is inherited.
  */
-@Testcontainers
 class TestHierarchyIT extends MySqlContainerIT {
 
     @Shared