no-jira: add missing sql updates

src/main/java/org/olat/upgrade/_spring/databaseUpgradeContext.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xmlns:context="http://www.springframework.org/schema/context" 
 	xsi:schemaLocation="
   http://www.springframework.org/schema/beans 
-  http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
-  http://www.springframework.org/schema/context 
-  http://www.springframework.org/schema/context/spring-context-3.0.xsd">
+  http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
   
  	<bean id="databaseUpgrader" class="org.olat.upgrade.DatabaseUpgradeManager" init-method="init"
  		depends-on="org.olat.core.util.WebappHelper">
@@ -47,6 +44,10 @@
 					<constructor-arg index="0" value="OLAT_8.3.0" />
 					<property name="alterDbStatements" value="alter_8_2_0_to_8_3_0.sql" />
 				</bean>
+				<bean id="database_upgrade_8_4_0" class="org.olat.upgrade.DatabaseUpgrade">
+					<constructor-arg index="0" value="OLAT_8.4.0" />
+					<property name="alterDbStatements" value="alter_8_3_0_to_8_4_0.sql" />
+				</bean>
 			</list>
 		</property>
 	</bean>