(cherry picked from commit 811310fd06ca8589fa8e87da6b8bdaea403bf660)
[MIG] Improve the code and fix some bugs
(cherry picked from commit 5bcdfe3f748884d650120f76d1642b820d0a800b)
[FIX] Change the parent for the menu Credit Control (the previous parent menu was not in the Odoo standard)
(cherry picked from commit 826257ce7b5248956d838cae9c94a012d550327e)
[FIX] Fix a lot of errors to respect pep8
(cherry picked from commit bed6cf35d665eea32122c91d33322af141053f29)
[FIX] Respect PEP8
(cherry picked from commit 6353eef0dce1bfe5db8a38d3410d1cc7f833fa10)