This section contains genesis-related settings including genesis-related or natives-related
extensions. Currently it includes the set of node roles that may be designated
duing the native Designation contract initialisation.
Close#3156.
Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>
And rename roles.go to role.go to match the role_string.go and the
existing naming pattern for enums.
Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>
