more s/astroquery.xmm/astroquery.esa.xmm/ in __init__ & setup_package

Author: keflavich

astroquery/esa/xmm_newton/__init__.py

@@ -15,7 +15,7 @@
 
 class Conf(_config.ConfigNamespace):
     """
-    Configuration parameters for `astroquery.xmm_newton`.
+    Configuration parameters for `astroquery.esa.xmm_newton`.
     """
     DATA_ACTION = _config.ConfigItem("http://nxsa.esac.esa.int/"
                                      "nxsa-sl/servlet/data-action?",

astroquery/esa/xmm_newton/tests/setup_package.py

@@ -23,4 +23,4 @@ def get_package_data():
              ]  # etc, add other extensions
     # you can also enlist files individually by names
     # finally construct and return a dict for the sub module
-    return {'astroquery.xmm_newton.tests': paths}
+    return {'astroquery.esa.xmm_newton.tests': paths}