Introduce LogFileHandler class
Introduce LogFileHandler class

Add a log handler class which logs to /dev/console in case of logging errors.

Signed-off-by: Luca Bigliardi <e702700dc9a886e6138bb50811fbdce0772e040e@google.com>
Reviewed-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>

mbakke/ganeti,onponomarev/ganeti,yiannist/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,grnet/snf-ganeti,leshchevds/ganeti,andir/ganeti,dimara/ganeti,ganeti/ganeti,bitemyapp/ganeti,yiannist/ganeti,dimara/ganeti,leshchevds/ganeti,andir/ganeti,ganeti/ganeti,mbakke/ganeti,ganeti/ganeti,apyrgio/snf-ganeti,apyrgio/ganeti,mbakke/ganeti,apyrgio/ganeti,leshchevds/ganeti,yiannist/ganeti,apyrgio/snf-ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,grnet/snf-ganeti,onponomarev/ganeti