[TEST] Fixes for randomised failures

- role_mapping.native is always present, but contains no entries if the security index is unavailable
- file based role mapping does not allow duplicate keys

Original commit: elastic/x-pack-elasticsearch@734cf7e2c0

plugin/src/test/java/org/elasticsearch/integration/ldap/AbstractAdLdapRealmTestCase.java

@@ -323,6 +323,26 @@ public abstract class AbstractAdLdapRealmTestCase extends SecurityIntegTestCase
             }
         }
 
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o == null || getClass() != o.getClass()) {
+                return false;
+            }
+
+            final RoleMappingEntry that = (RoleMappingEntry) o;
+            return Objects.equals(this.fileContent, that.fileContent)
+                    && Objects.equals(this.nativeContent, that.nativeContent);
+        }
+
+        @Override
+        public int hashCode() {
+            int result = Objects.hashCode(fileContent);
+            result = 31 * result + Objects.hashCode(nativeContent);
+            return result;
+        }
     }
 
     /**

plugin/src/test/java/org/elasticsearch/integration/ldap/MultipleAdRealmTests.java

@@ -11,6 +11,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import org.elasticsearch.common.logging.ESLoggerFactory;
 import org.elasticsearch.common.settings.Settings;
@@ -40,8 +41,10 @@ public class MultipleAdRealmTests extends AbstractAdLdapRealmTestCase {
 
         // It's easier to test 2 realms when using file based role mapping, and for the purposes of
         // this test, there's no need to test native mappings.
-        AbstractAdLdapRealmTestCase.roleMappings = new ArrayList<>(realmConfig.selectRoleMappings(() -> true));
+        AbstractAdLdapRealmTestCase.roleMappings = Stream.concat(
-        AbstractAdLdapRealmTestCase.roleMappings.addAll(secondaryRealmConfig.selectRoleMappings(() -> true));
+                realmConfig.selectRoleMappings(() -> true).stream(),
+                secondaryRealmConfig.selectRoleMappings(() -> true).stream()
+        ).distinct().collect(Collectors.toList());
     }
 
     @Override

plugin/src/test/java/org/elasticsearch/xpack/security/SecurityFeatureSetTests.java

@@ -40,6 +40,8 @@ import java.util.Map;
 
 import static org.hamcrest.CoreMatchers.nullValue;
 import static org.hamcrest.Matchers.contains;
+import static org.hamcrest.Matchers.containsInAnyOrder;
+import static org.hamcrest.Matchers.emptyIterable;
 import static org.hamcrest.Matchers.hasEntry;
 import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.core.Is.is;
@@ -237,7 +239,8 @@ public class SecurityFeatureSetTests extends ESTestCase {
                     assertThat(source.getValue("role_mapping.native.size"), is(12));
                     assertThat(source.getValue("role_mapping.native.enabled"), is(10));
                 } else {
-                    assertThat(((Map) source.getValue("role_mapping")).isEmpty(), is(true));
+                    final Map<String, Object> roleMapping = source.getValue("role_mapping.native");
+                    assertThat(roleMapping.entrySet(), emptyIterable());
                 }
 
                 // system key