Remove redundant code on offset, limit parameters.

The API resource modules for secrets, orders and containers had logic to clean up
the provided offset and limit parameters for paged GET requests. However, this logic
is already provided in the model repositories that the API modules call to make the
list query, hence this code can be removed from the API modules.

Change-Id: Icd6c29156f3bf80582984dbeb1d35f14fd13272f
Fixed http 500 due to mismatch between ResponseDTO and tuple from plugin encrypt

Change-Id: Ib206c0cc17d71013ffb30af08b4cce4392171b08
Closes-Bug: #1320001
Remove extra parameter for generate_symmetric & generate_asymmetric in test plugin

Change-Id: I951157fd5f4ade5a13d0c86c8ebc062d3eb084b7
Merge "Fixed http 500 due to mismatch between ResponseDTO and tuple from plugin encrypt"
Merge "Remove extra parameter for generate_symmetric & generate_asymmetric in test plugin"
Merge "Remove redundant code on offset, limit parameters."