fix location constraint ceph error

Author: abh1sar

plugins/storage/object/ceph/src/main/java/org/apache/cloudstack/storage/datastore/driver/CephObjectStoreDriverImpl.java

@@ -350,7 +350,7 @@ protected AmazonS3 getS3Client(String url, String accessKey, String secretKey) {
                         new AWSStaticCredentialsProvider(
                                 new BasicAWSCredentials(accessKey, secretKey)))
                 .withEndpointConfiguration(
-                        new AwsClientBuilder.EndpointConfiguration(url, null))
+                        new AwsClientBuilder.EndpointConfiguration(url, "us-east-1"))
                 .build();
 
         if (client == null) {