fix flaky test

Signed-off-by: Stephen Crawford <[email protected]>

server/src/main/java/org/opensearch/identity/tokens/BasicAuthToken.java

@@ -23,7 +23,7 @@ public final class BasicAuthToken implements AuthToken {
 
     public BasicAuthToken(final String headerValue) {
         final String base64Encoded = headerValue.substring(TOKEN_IDENTIFIER.length()).trim();
-        final byte[] rawDecoded = Base64.getDecoder().decode(base64Encoded);
+        final byte[] rawDecoded = Base64.getUrlDecoder().decode(base64Encoded);
         final String usernamepassword = new String(rawDecoded, StandardCharsets.UTF_8);
 
         final String[] tokenParts = usernamepassword.split(":", 2);

server/src/test/java/org/opensearch/extensions/rest/RestInitializeExtensionActionTests.java

@@ -47,7 +47,6 @@
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.emptySet;
 import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
@@ -161,7 +160,6 @@ public void testRestInitializeExtensionActionResponseWithAdditionalSettings() th
 
         // optionally, you can stub out some methods:
         when(spy.getAdditionalSettings()).thenCallRealMethod();
-        doNothing().when(spy).issueServiceAccount(any());
         Mockito.doCallRealMethod().when(spy).loadExtension(any(ExtensionsSettings.Extension.class));
         Mockito.doNothing().when(spy).initialize();
         RestInitializeExtensionAction restInitializeExtensionAction = new RestInitializeExtensionAction(spy);
@@ -212,7 +210,6 @@ public void testRestInitializeExtensionActionResponseWithAdditionalSettingsUsing
 
         // optionally, you can stub out some methods:
         when(spy.getAdditionalSettings()).thenCallRealMethod();
-        doNothing().when(spy).issueServiceAccount(any());
         Mockito.doCallRealMethod().when(spy).loadExtension(any(ExtensionsSettings.Extension.class));
         Mockito.doNothing().when(spy).initialize();
         RestInitializeExtensionAction restInitializeExtensionAction = new RestInitializeExtensionAction(spy);