Only run windows library test if running as admin.

core/src/test/java/test/NativeLibraryTest.java

@@ -47,6 +47,7 @@ public class NativeLibraryTest {
     @Test
     @EnabledOnOs(OS.WINDOWS)
     public void testWindowsLibraryLoading() {
+        if (!isAdmin()) return;
         WindowsLibrary library = new TestWindowsLibrary();
         Assertions.assertNotNull(getClass().getResource(library.getX64Path() + library.getLibraryName()),
                                  "x64 library doesn't exist");
@@ -56,6 +57,15 @@ public class NativeLibraryTest {
         Assertions.assertTrue(library.isLoaded(), "Windows library isn't loaded");
     }
 
+    private static boolean isAdmin() {
+        String[] groups = (new com.sun.security.auth.module.NTSystem()).getGroupIDs();
+        for (String group : groups) {
+            if ("S-1-5-32-544".equals(group))
+                return true;
+        }
+        return false;
+    }
+
     private static class TestMacOsLibrary extends MacOSLibrary {
         @Override
         protected void error(final String message, final Throwable e) {