Add new unit tests for API python module

[davidjiglesias]

As we can observe in issue #9877 from the latest RC tests, the total coverage for the python modules is 76% for the Framework module, 19% for the API module and 24% for the Wodles module.

Since these tests are going to be passed in every PR and in every RC testing protocol, it is very important that we increase our code coverage to guarantee the proper behaviour of every module. Therefore, we should design and add new tests to increase the total coverage for the API module. The current coverage for the module can be seen in the table below.

API

Name	Stmts	Miss	Cover	Status
api/init.py	0	0	100%	🟩
api/alogging.py	43	3	93%	🟩
api/api_exception.py	11	0	100%	🟩
api/authentication.py	98	7	93%	🟩
api/configuration.py	85	4	95%	🟩
api/constants.py	10	0	100%	🟩
api/controllers/init.py	0	0	100%	🟩
api/controllers/active_response_controller.py	15	15	0%	🟥
api/controllers/agent_controller.py	221	221	0%	🟥
api/controllers/cdb_list_controller.py	40	40	0%	🟥
api/controllers/ciscat_controller.py	13	13	0%	🟥
api/controllers/cluster_controller.py	143	143	0%	🟥
api/controllers/decoder_controller.py	45	45	0%	🟥
api/controllers/default_controller.py	15	15	0%	🟥
api/controllers/experimental_controller.py	100	100	0%	🟥
api/controllers/manager_controller.py	96	96	0%	🟥
api/controllers/mitre_controller.py	13	13	0%	🟥
api/controllers/overview_controller.py	12	12	0%	🟥
api/controllers/rootcheck_controller.py	27	27	0%	🟥
api/controllers/rule_controller.py	57	57	0%	🟥
api/controllers/sca_controller.py	20	20	0%	🟥
api/controllers/security_controller.py	233	233	0%	🟥
api/controllers/syscheck_controller.py	31	31	0%	🟥
api/controllers/syscollector_controller.py	65	65	0%	🟥
api/controllers/task_controller.py	13	13	0%	🟥
api/controllers/vulnerability_controller.py	12	12	0%	🟥
api/encoder.py	24	24	0%	🟥
api/middlewares.py	101	101	0%	🟥
api/models/init.py	3	3	0%	🟥
api/models/active_response_model.py	36	36	0%	🟥
api/models/agent_added_model.py	29	29	0%	🟥
api/models/agent_inserted_model.py	48	48	0%	🟥
api/models/base_model_.py	104	104	0%	🟥
api/models/basic_info_model.py	59	59	0%	🟥
api/models/configuration_model.py	212	212	0%	🟥
api/models/group_added_model.py	15	15	0%	🟥
api/models/security_model.py	72	72	0%	🟥
api/models/security_token_response_model.py	19	19	0%	🟥
api/uri_parser.py	29	29	0%	🟥
api/util.py	108	10	91%	🟩
api/validator.py	145	10	93%	🟩
TOTAL	2422	1956	19%	🟥

[vicferpoy]

Issue update

After closing all the related issues, coverage and testing quality has been highly increased.

	Coverage	Status
Before	19%	🟥
After	98%	🟩

API

Name	Stmts	Miss	Cover	Status
api/init.py	0	0	100%	🟩
api/alogging.py	43	3	93%	🟩
api/api_exception.py	11	0	100%	🟩
api/authentication.py	107	7	93%	🟩
api/configuration.py	85	4	95%	🟩
api/constants.py	10	0	100%	🟩
api/controllers/init.py	0	0	100%	🟩
api/controllers/active_response_controller.py	15	0	100%	🟩
api/controllers/agent_controller.py	228	0	100%	🟩
api/controllers/cdb_list_controller.py	40	0	100%	🟩
api/controllers/ciscat_controller.py	13	0	100%	🟩
api/controllers/cluster_controller.py	143	0	100%	🟩
api/controllers/decoder_controller.py	45	0	100%	🟩
api/controllers/default_controller.py	15	0	100%	🟩
api/controllers/experimental_controller.py	109	0	100%	🟩
api/controllers/manager_controller.py	96	0	100%	🟩
api/controllers/mitre_controller.py	41	0	100%	🟩
api/controllers/overview_controller.py	12	0	100%	🟩
api/controllers/rootcheck_controller.py	27	0	100%	🟩
api/controllers/rule_controller.py	57	0	100%	🟩
api/controllers/sca_controller.py	20	0	100%	🟩
api/controllers/security_controller.py	233	0	100%	🟩
api/controllers/syscheck_controller.py	31	0	100%	🟩
api/controllers/syscollector_controller.py	65	0	100%	🟩
api/controllers/task_controller.py	13	0	100%	🟩
api/controllers/vulnerability_controller.py	12	0	100%	🟩
api/encoder.py	24	1	96%	🟩
api/middlewares.py	102	35	66%	🟨
api/models/init.py	3	0	100%	🟩
api/models/active_response_model.py	36	0	100%	🟩
api/models/agent_added_model.py	29	0	100%	🟩
api/models/agent_inserted_model.py	48	0	100%	🟩
api/models/base_model_.py	104	0	100%	🟩
api/models/basic_info_model.py	59	0	100%	🟩
api/models/configuration_model.py	212	0	100%	🟩
api/models/group_added_model.py	15	0	100%	🟩
api/models/security_model.py	72	0	100%	🟩
api/models/security_token_response_model.py	19	0	100%	🟩
api/signals.py	2	2	0%	🟥
api/uri_parser.py	29	0	100%	🟩
api/util.py	108	4	96%	🟩
api/validator.py	145	10	93%	🟩
TOTAL	2478	66	98%	🟩