Allow remote config to send non-boolean values

This version of remote config allows non-boolean values to be returned
to clients but unfortunately limits the configuration to only one
value or another. There is no way to configure more than two values
for the same key with this setup.

service/src/main/resources/accountsdb.xml

@@ -310,5 +310,12 @@
     <changeSet id="16" author="moxie">
         <dropColumn tableName="keys" columnName="deleted"/>
     </changeSet>
+    
+    <changeSet id="17" author="ehren">
+        <addColumn tableName="remote_config">
+            <column name="default_value" type="text"/>
+            <column name="value" type="text"/>
+        </addColumn>
+    </changeSet>
 
 </databaseChangeLog>