add passing test that takes snapshot

plugins/repository-hdfs/src/test/resources/rest-api-spec/test/hdfs_repository/20_repository.yaml

@@ -10,7 +10,7 @@
           body:
             type: hdfs
             settings:
-              uri: "hdfs://localhost:8888"
+              uri: "hdfs://localhost:39226"
               path: "foo/bar"
 
     # Get repositry

plugins/repository-hdfs/src/test/resources/rest-api-spec/test/hdfs_repository/30_snapshot.yaml

@@ -0,0 +1,43 @@
+# Integration tests for HDFS Repository plugin
+#
+# Actually perform a snapshot to hdfs
+#
+---
+setup:
+
+  - do:
+      snapshot.create_repository:
+        repository: test_repo_hdfs_snapshot
+        verify: false
+        body:
+          type: hdfs
+          settings:
+            uri: "hdfs://localhost:39226"
+            path: "foo/bar"
+
+  - do:
+      indices.create:
+        index: test_index
+        body:
+          settings:
+            number_of_shards:   1
+            number_of_replicas: 1
+
+  - do:
+      cluster.health:
+        wait_for_status: yellow
+
+---
+"Create a snapshot":
+
+  - do:
+      snapshot.create:
+        repository: test_repo_hdfs_snapshot
+        snapshot: test_snapshot
+        wait_for_completion: true
+
+  - match: { snapshot.snapshot: test_snapshot }
+  - match: { snapshot.state : SUCCESS }
+  - match: { snapshot.shards.successful: 1 }
+  - match: { snapshot.shards.failed : 0 }
+