HADOOP-18908. Fix tests

* ignore failing endpoint test pending followup JIRA.
* S3guard bucket-info command to fall back to listXattrs(/)
  if getBucketInfo fails, so as to force a bucket lookup even
  if the region can be inferred from the endpoint.

Change-Id: I1fbcc5371cb13f1d34ec371fd4c29f106aa4a062

Author: steveloughran

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/s3guard/S3GuardTool.java

@@ -406,6 +406,13 @@ public int run(String[] args, PrintStream out)
         // Note and continue.
         LOG.debug("failed to get bucket location", e);
         println(out, LOCATION_UNKNOWN);
+
+        // it may be the bucket is not found; we can't differentiate
+        // that and handle third party store issues where the API may
+        // not work.
+        // Fallback to looking for bucket root attributes.
+        println(out, "Probing for bucket existence");
+        fs.listXAttrs(new Path("/"));
       }
 
       // print any auth paths for directory marker info