Change application environment variable names for logs in windows scripts.

Follow up to #1335
Fixes #1434
[#153216683]

Author: Daniil Fedotov

scripts/rabbitmq-server.bat

@@ -179,8 +179,8 @@ if "!ENV_OK!"=="false" (
 -sasl errlog_type error ^
 -sasl sasl_error_logger !SASL_ERROR_LOGGER! ^
 -rabbit lager_log_root \""!RABBITMQ_LOG_BASE:\=/!"\" ^
--rabbit lager_handler !RABBIT_LAGER_HANDLER! ^
--rabbit lager_handler_upgrade !RABBITMQ_LAGER_HANDLER_UPGRADE! ^
+-rabbit lager_default_file !RABBIT_LAGER_HANDLER! ^
+-rabbit lager_upgrade_file !RABBITMQ_LAGER_HANDLER_UPGRADE! ^
 -rabbit enabled_plugins_file \""!RABBITMQ_ENABLED_PLUGINS_FILE:\=/!"\" ^
 -rabbit plugins_dir \""!RABBITMQ_PLUGINS_DIR:\=/!"\" ^
 -rabbit plugins_expand_dir \""!RABBITMQ_PLUGINS_EXPAND_DIR:\=/!"\" ^

scripts/rabbitmq-service.bat

@@ -259,8 +259,8 @@ set ERLANG_SERVICE_ARGUMENTS= ^
 -sasl errlog_type error ^
 -sasl sasl_error_logger false ^
 -rabbit lager_log_root \""!RABBITMQ_LOG_BASE:\=/!"\" ^
--rabbit lager_handler !RABBIT_LAGER_HANDLER! ^
--rabbit lager_handler_upgrade !RABBITMQ_LAGER_HANDLER_UPGRADE! ^
+-rabbit lager_default_file !RABBIT_LAGER_HANDLER! ^
+-rabbit lager_upgrade_file !RABBITMQ_LAGER_HANDLER_UPGRADE! ^
 -rabbit enabled_plugins_file \""!RABBITMQ_ENABLED_PLUGINS_FILE:\=/!"\" ^
 -rabbit plugins_dir \""!RABBITMQ_PLUGINS_DIR:\=/!"\" ^
 -rabbit plugins_expand_dir \""!RABBITMQ_PLUGINS_EXPAND_DIR:\=/!"\" ^