Use adapter auto-detect

git-svn-id: https://svn.apache.org/repos/asf/turbine/maven/archetypes@1768280 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/trunk/turbine-webapp-4.0/src/main/resources/META-INF/maven/archetype-metadata.xml b/trunk/turbine-webapp-4.0/src/main/resources/META-INF/maven/archetype-metadata.xml
index 9e97865..cff504c 100644
--- a/trunk/turbine-webapp-4.0/src/main/resources/META-INF/maven/archetype-metadata.xml
+++ b/trunk/turbine-webapp-4.0/src/main/resources/META-INF/maven/archetype-metadata.xml
@@ -34,7 +34,7 @@
       <defaultValue>turbine</defaultValue>
     </requiredProperty>
     <requiredProperty key="turbine_database_adapter">
-      <defaultValue>mysql</defaultValue>
+      <defaultValue>auto</defaultValue>
     </requiredProperty>
     <requiredProperty key="turbine_database_jndipath">
       <defaultValue>java:comp/env/jdbc/Turbine</defaultValue>