Add a test for security provider run time registration.

Author: jovanstevanovic

substratevm/src/com.oracle.svm.test/src/com/oracle/svm/test/services/SecurityServiceTest.java

@@ -63,6 +63,21 @@ public void duringSetup(final DuringSetupAccess access) {
         }
     }
 
+    /**
+     * This test ensures that the list of security providers is populated at run time, and not at
+     * build time.
+     */
+    @Test
+    public void testSecurityProviderRuntimeRegistration() {
+        Provider notRegistered = Security.getProvider("no-op-provider");
+        Assert.assertNull("Provider is registered.", notRegistered);
+
+        Security.addProvider(new NoOpProvider());
+
+        Provider registered = Security.getProvider("no-op-provider");
+        Assert.assertNotNull("Provider is not registered.", registered);
+    }
+
     /**
      * Tests that native-image generation doesn't run into an issue (like NPE) if the application
      * uses a java.security.Provider.Service which isn't part of the services shipped in the JDK.