Update SSLReloadIntegTests to work with JDK11 (#34129)

In prior versions of Java, we expected to see a SSLHandshakeException
when starting a handshake with a server that we do not trust. In JDK11,
the exception has changed to a SSLException, which
SSLHandshakeException extends. This is most likely a side effect of the
TLS 1.3 changes in JDK11. This change updates the test to catch the
SSLException instead of the SSLHandshakeException and enables the test
to work on JDK8 through JDK11.

Closes #32293

Author: jaymode

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/ssl/SSLReloadIntegTests.java

@@ -5,9 +5,7 @@
  */
 package org.elasticsearch.xpack.ssl;
 
-
 import org.elasticsearch.ElasticsearchException;
-import org.elasticsearch.bootstrap.JavaVersion;
 import org.elasticsearch.common.settings.MockSecureSettings;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.transport.TransportAddress;
@@ -17,7 +15,7 @@
 import org.elasticsearch.xpack.core.ssl.SSLConfiguration;
 import org.elasticsearch.xpack.core.ssl.SSLService;
 
-import javax.net.ssl.SSLHandshakeException;
+import javax.net.ssl.SSLException;
 import javax.net.ssl.SSLSocket;
 import javax.net.ssl.SSLSocketFactory;
 import java.io.IOException;
@@ -92,7 +90,6 @@ protected boolean transportSSLEnabled() {
     }
 
     public void testThatSSLConfigurationReloadsOnModification() throws Exception {
-        assumeFalse("test fails on JDK 11 currently", JavaVersion.current().compareTo(JavaVersion.parse("11")) < 0);
         Path keyPath = createTempDir().resolve("testnode_updated.pem");
         Path certPath = createTempDir().resolve("testnode_updated.crt");
         Files.copy(getDataPath("/org/elasticsearch/xpack/security/transport/ssl/certs/simple/testnode_updated.pem"), keyPath);
@@ -118,7 +115,7 @@ public void testThatSSLConfigurationReloadsOnModification() throws Exception {
             assertThat(socket.isConnected(), is(true));
             socket.startHandshake();
             fail("handshake should not have been successful!");
-        } catch (SSLHandshakeException | SocketException expected) {
+        } catch (SSLException | SocketException expected) {
             logger.trace("expected exception", expected);
         }
         // Copy testnode_updated.crt to the placeholder updateable.crt so that the nodes will start trusting it now