Injection parameters can be used in the lambda passed to
inject_with_handler method to take some values from
the test. However, there was no way to set values to these
parameters on node startup, only through
the error injection REST api. Therefore, we couldn't rely
on this when inject_with_handler is used during
node startup, it could trigger before we call the api
from the test.
In this commit with solve this problem by allowing these
parameters to be assigned through scylla.yaml config.
The defer.hh header was added to error_injection.hh to fix
compilation after adding error_injection.hh to config.hh,
defer function is used in error_injection.hh.
49a4220fea