This adds a stub implementation for the cache_service. It also register
the API doc.
The cache_service doc will be available at:
http://localhost:10000/api-doc/cache_service/
The stub implementation returns the correct value type with stubbed
values.
After this patch the following path will be available:
/cache_service/row_cache_save_period
/cache_service/key_cache_save_period
/cache_service/counter_cache_save_period
/cache_service/row_cache_keys_to_save
/cache_service/key_cache_keys_to_save
/cache_service/counter_cache_keys_to_save
/cache_service/invalidate_key_cache
/cache_service/invalidate_counter_cache
/cache_service/row_cache_capacity
/cache_service/key_cache_capacity
/cache_service/counter_cache_capacity
/cache_service/save_caches
Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>