chore(rmi): Revert RMI instrumentation deactivation (#10897)

This reverts commit ee6b3da.

Author: PerfectSlayer

dd-java-agent/instrumentation/java/java-rmi-1.1/src/main/java/datadog/trace/instrumentation/rmi/client/RmiClientInstrumentation.java

@@ -30,11 +30,6 @@ public RmiClientInstrumentation() {
     super("rmi", "rmi-client");
   }
 
-  @Override
-  protected boolean defaultEnabled() {
-    return false;
-  }
-
   @Override
   public String hierarchyMarkerType() {
     return null; // bootstrap type

dd-java-agent/instrumentation/java/java-rmi-1.1/src/main/java/datadog/trace/instrumentation/rmi/context/client/RmiClientContextInstrumentation.java

@@ -11,6 +11,7 @@
 import com.google.auto.service.AutoService;
 import datadog.trace.agent.tooling.Instrumenter;
 import datadog.trace.agent.tooling.InstrumenterModule;
+import datadog.trace.api.Platform;
 import datadog.trace.bootstrap.ContextStore;
 import datadog.trace.bootstrap.InstrumentationContext;
 import datadog.trace.bootstrap.instrumentation.api.AgentSpan;
@@ -54,7 +55,8 @@ public RmiClientContextInstrumentation() {
 
   @Override
   protected boolean defaultEnabled() {
-    return false;
+    return super.defaultEnabled()
+        && !Platform.isNativeImageBuilder(); // not applicable in native-image
   }
 
   @Override

dd-java-agent/instrumentation/java/java-rmi-1.1/src/main/java/datadog/trace/instrumentation/rmi/context/server/RmiServerContextInstrumentation.java

@@ -10,6 +10,7 @@
 import com.google.auto.service.AutoService;
 import datadog.trace.agent.tooling.Instrumenter;
 import datadog.trace.agent.tooling.InstrumenterModule;
+import datadog.trace.api.Platform;
 import datadog.trace.bootstrap.instrumentation.rmi.ContextDispatcher;
 import net.bytebuddy.asm.Advice;
 import net.bytebuddy.description.type.TypeDescription;
@@ -28,7 +29,8 @@ public RmiServerContextInstrumentation() {
 
   @Override
   protected boolean defaultEnabled() {
-    return false;
+    return super.defaultEnabled()
+        && !Platform.isNativeImageBuilder(); // not applicable in native-image
   }
 
   @Override

dd-java-agent/instrumentation/java/java-rmi-1.1/src/main/java/datadog/trace/instrumentation/rmi/server/RmiServerInstrumentation.java

@@ -33,11 +33,6 @@ public RmiServerInstrumentation() {
     super("rmi", "rmi-server");
   }
 
-  @Override
-  protected boolean defaultEnabled() {
-    return false;
-  }
-
   @Override
   public String hierarchyMarkerType() {
     return null; // bootstrap type

dd-java-agent/instrumentation/java/java-rmi-1.1/src/test/groovy/RmiTest.groovy

@@ -14,8 +14,6 @@ import static datadog.trace.agent.test.asserts.ListWriterAssert.assertTraces
 import static datadog.trace.agent.test.utils.TraceUtils.basicSpan
 import static datadog.trace.agent.test.utils.TraceUtils.runUnderTrace
 
-import spock.lang.Ignore
-
 abstract class RmiTest extends VersionedNamingTestBase {
   def registryPort = PortUtils.randomOpenPort()
   def serverRegistry = LocateRegistry.createRegistry(registryPort)
@@ -231,7 +229,6 @@ abstract class RmiTest extends VersionedNamingTestBase {
   }
 }
 
-@Ignore
 class RmiV0Test extends RmiTest {
 
   @Override
@@ -250,7 +247,6 @@ class RmiV0Test extends RmiTest {
   }
 }
 
-@Ignore
 class RmiV1ForkedTest extends RmiTest {
 
   @Override