Drop -Werror from developer mode
Drop -Werror from developer mode

As the code currently stands, it emits a handful of warnings that can't
be trivially fixed, like Control.Monad.Error deprecation and
monomorphism restriction warnings. To make tests useful again, turn off
-Werror until we have sorted out all warnings.

Signed-off-by: Apollon Oikonomopoulos <ed81ed0a45ccd5c8869bda52e38353a6299ee39e@debian.org>

ganeti/ganeti,mbakke/ganeti,mbakke/ganeti,ganeti/ganeti,mbakke/ganeti,ganeti/ganeti