Use relative imports in xpack module (elastic#898)

To be consistent with the other part of library and to allow vendoring without code change, use relative imports also in the ``elasticsearch.client.xpack`` module.

Author: beezz

elasticsearch/client/xpack/__init__.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params
+from ..utils import NamespacedClient, query_params
 
 from .graph import GraphClient
 from .license import LicenseClient

elasticsearch/client/xpack/deprecation.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params, _make_path
+from ..utils import NamespacedClient, query_params, _make_path
 
 class DeprecationClient(NamespacedClient):
  @query_params()

elasticsearch/client/xpack/graph.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params, _make_path
+from ..utils import NamespacedClient, query_params, _make_path
 
 class GraphClient(NamespacedClient):
  @query_params('routing', 'timeout')

elasticsearch/client/xpack/license.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
+from ..utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
 
 class LicenseClient(NamespacedClient):
  @query_params()

elasticsearch/client/xpack/migration.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
+from ..utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
 
 class MigrationClient(NamespacedClient):
  @query_params('allow_no_indices', 'expand_wildcards', 'ignore_unavailable')

elasticsearch/client/xpack/ml.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
+from ..utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
 
 class MlClient(NamespacedClient):
  @query_params('from_', 'size')

elasticsearch/client/xpack/monitoring.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
+from ..utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
 
 class MonitoringClient(NamespacedClient):
  @query_params('interval', 'system_api_version', 'system_id')

elasticsearch/client/xpack/security.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
+from ..utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
 
 class SecurityClient(NamespacedClient):
  @query_params('refresh')

elasticsearch/client/xpack/watcher.py

@@ -1,4 +1,4 @@
-from elasticsearch.client.utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
+from ..utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
 
 class WatcherClient(NamespacedClient):
  @query_params()