Does not work with logback plugin

[aberbenni]

Platform-core doesn't work with logback. It's explicitly creating log4j loggers rather than using slf4j or commons-logging.

Errors during compilation:

/plugins/platform-core-1.0.RC5/src/java/org/grails/plugin/platform/events/publisher/DefaultEventsPublisher.java:21: package org.apache.log4j does not exist
import org.apache.log4j.Logger;

/plugins/platform-core-1.0.RC5/src/java/org/grails/plugin/platform/events/publisher/DefaultEventsPublisher.java:53: cannot find symbol
symbol : class Logger
location: class org.grails.plugin.platform.events.publisher.DefaultEventsPublisher
private final static Logger log = Logger.getLogger(DefaultEventsPublisher.class);

/plugins/platform-core-1.0.RC5/src/java/org/grails/plugin/platform/events/registry/DefaultEventsRegistry.java:21: package org.apache.log4j does not exist
import org.apache.log4j.Logger;

/plugins/platform-core-1.0.RC5/src/java/org/grails/plugin/platform/events/registry/DefaultEventsRegistry.java:46: cannot find symbol
symbol : class Logger
location: class org.grails.plugin.platform.events.registry.DefaultEventsRegistry
static final private Logger log = Logger.getLogger(DefaultEventsRegistry.class);

/plugins/platform-core-1.0.RC5/src/java/org/grails/plugin/platform/events/publisher/GormBridgePublisher.java:20: package org.apache.log4j does not exist
import org.apache.log4j.Logger;

/plugins/platform-core-1.0.RC5/src/java/org/grails/plugin/platform/events/publisher/GormBridgePublisher.java:44: cannot find symbol
symbol : class Logger
location: class org.grails.plugin.platform.events.publisher.GormBridgePublisher
private final static Logger log = Logger.getLogger(GormBridgePublisher.class);

/plugins/platform-core-1.0.RC5/src/java/org/grails/plugin/platform/events/publisher/DefaultEventsPublisher.java:53: cannot find symbol
symbol : variable Logger
location: class org.grails.plugin.platform.events.publisher.DefaultEventsPublisher
private final static Logger log = Logger.getLogger(DefaultEventsPublisher.class);

/plugins/platform-core-1.0.RC5/src/java/org/grails/plugin/platform/events/registry/DefaultEventsRegistry.java:46: cannot find symbol
symbol : variable Logger
location: class org.grails.plugin.platform.events.registry.DefaultEventsRegistry
static final private Logger log = Logger.getLogger(DefaultEventsRegistry.class);