Fix region settings for s3 snapshot repository in eu-west-1

Closes #169.

Author: emate

src/main/java/org/elasticsearch/repositories/s3/S3Repository.java

@@ -110,9 +110,9 @@ public S3Repository(RepositoryName name, RepositorySettings repositorySettings,
                 } else if ("ap-northeast-1".equals(regionSetting)) {
                     region = "ap-northeast-1";
                 } else if ("eu-west".equals(regionSetting)) {
-                    region = "EU";
+                    region = "eu-west-1";
                 } else if ("eu-west-1".equals(regionSetting)) {
-                    region = "EU";
+                    region = "eu-west-1";
                 } else if ("eu-central".equals(regionSetting)) {
                     region = "eu-central-1";
                 } else if ("eu-central-1".equals(regionSetting)) {