Be slightly more defensive in DataSource initialization

Adding an Order to the BeanPostProcessor and catching an exception
are enough to get a simple web app with @EnableGlobalMethodSecurity
and JDBC user details running. It actually doesn't solve an underlying
problem in Spring Security, but I'll deal with that separately.

See gh-1115

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/DataSourceInitializer.java

@@ -26,8 +26,8 @@ import javax.sql.DataSource;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationListener;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.core.io.Resource;
 import org.springframework.jdbc.datasource.init.DatabasePopulatorUtils;
 import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
@@ -48,7 +48,7 @@ class DataSourceInitializer implements ApplicationListener<DataSourceInitialized
 	private static Log logger = LogFactory.getLog(DataSourceInitializer.class);
 
 	@Autowired
-	private ApplicationContext applicationContext;
+	private ConfigurableApplicationContext applicationContext;
 
 	@Autowired(required = false)
 	private DataSource dataSource;
@@ -75,9 +75,15 @@ class DataSourceInitializer implements ApplicationListener<DataSourceInitialized
 		List<Resource> scripts = getScripts(this.properties.getSchema(), "schema");
 		if (!scripts.isEmpty()) {
 			runScripts(scripts);
+			try {
 				this.applicationContext.publishEvent(new DataSourceInitializedEvent(
 						this.dataSource));
 			}
+			catch (IllegalStateException e) {
+				logger.warn("Could not send event to complete DataSource initialization ("
+						+ e.getMessage() + ")");
+			}
+		}
 	}
 
 	@Override

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/DataSourceInitializerPostProcessor.java

@@ -26,6 +26,7 @@ import org.springframework.beans.factory.config.BeanPostProcessor;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.beans.factory.support.GenericBeanDefinition;
 import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
+import org.springframework.core.Ordered;
 import org.springframework.core.type.AnnotationMetadata;
 
 /**
@@ -35,7 +36,14 @@ import org.springframework.core.type.AnnotationMetadata;
  * @author Dave Syer
  * @since 1.1.2
  */
-class DataSourceInitializerPostProcessor implements BeanPostProcessor {
+class DataSourceInitializerPostProcessor implements BeanPostProcessor, Ordered {
+
+	private int order = Ordered.HIGHEST_PRECEDENCE;
+
+	@Override
+	public int getOrder() {
+		return this.order;
+	}
 
 	@Autowired
 	private BeanFactory beanFactory;