Hue drop table button fails to remove underlying files from HDFS

Scenario 1 (correct behaviour):

1. Create database 'testdb' using the 'Create database' button in the metastore browser
   1. Database directory on HDFS is created with ownership john:hive drwxrwxrwxt (logged into Hue as john)
2. Create table testdb.test_table
3. Both 'Drop table' button in metastore browser and executing a DROP TABLE Impala query correctly delete the table files from HDFS

Scenario 2 (expected behaviour):

1. Create database 'testdb' by running CREATE DATABASE Impala query
   1. Database directory on HDFS is created with ownership impala:hive drwxrwxrwxt
2. Create table testdb.test_table
3. 'Drop table' button in metastore browser removes the table but does not remove the underlying files from HDFS
4. Executing a DROP TABLE Impala query does correctly delete the table files from HDFS

Similar behaviour occurs when dropping databases via Hue metastore browser GUI in Scenario 2 (i.e. database directory on HDFS is not removed).

The failure to remove the underlying files means that if a table is subsequently created with the same name, this new table will also contain the old data that was not deleted.