Allow webhdfs user customization

Author: Donald Hunter

api/src/main/resources/app.py

@@ -328,7 +328,7 @@ def main():
                                               package_registrar.HbasePackageRegistrar(
                                                   config['environment']['hbase_thrift_server'],
                                                   config['environment']['webhdfs_host'],
-                                                  'hdfs',
+                                                  config['environment']['webhdfs_user'],
                                                   config['environment']['webhdfs_port'],
                                                   config['config']['stage_root']),
                                               application_registrar.HbaseApplicationRegistrar(

api/src/main/resources/application_creator.py

@@ -44,7 +44,7 @@ def __init__(self, config, environment, service):
         self._name_regex = re.compile('')
         self._hdfs_client = HDFS(environment['webhdfs_host'],
                                  environment['webhdfs_port'],
-                                 'hdfs')
+                                 environment['webhdfs_user'])
 
     def assert_application_properties(self, override_properties, default_properties):
         for component_type, component_properties in default_properties.iteritems():