[1.0, 1.1, 1.2, 1.3] replaced this->level usage by this->getLogLevel (closes #6086)
[1.0, 1.1, 1.2, 1.3] replaced this->level usage by this->getLogLevel (closes #6086)

theodo/symfony1.0-backports,theodo/symfony1.0-backports,theodo/symfony1.0-backports