The codebase is filled with includes that are unused, and which thus can be removed. At the same time, the files often do not include all headers that contain the definitions used in those files. This change uses clang-format and clang-tidy to clean up the includes, with minor manual intervention to ensure the code compiles on all platforms.
If the permissioned domains amendment XLS-80 is enabled before credentials XLS-70, then the permissioned domain users will not be able to match any credentials. The changes here prevent the creation of any permissioned domain objects if credentials are not enabled.
