Set prepare_sql = true to test #703 changes

Author: hazzik

build-common/teamcity-hibernate.cfg.xml

@@ -20,6 +20,7 @@
 			<property name="connection.connection_string">Server=.\SQLExpress;initial catalog=nhibernate;Integrated Security=SSPI</property>
 			<property name="show_sql">false</property>
 			<property name="command_timeout">444</property>
+      <property name="prepare_sql">true</property>
 			<property name="query.substitutions">true 1, false 0, yes 'Y', no 'N'</property>
 			<property name="adonet.wrap_result_sets">false</property>