avoid derby.log in the current directory

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1177903 13f79535-47bb-0310-9956-ffa450edef68

archiva-modules/archiva-base/archiva-repository-admin/archiva-repository-admin-default/pom.xml

@@ -209,8 +209,9 @@
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
           <systemPropertyVariables>
-            <appserver.base>${project.build.outputDirectory}</appserver.base>
-            <plexus.home>${project.build.outputDirectory}</plexus.home>
+            <appserver.base>${project.build.directory}/appserver-base</appserver.base>
+            <plexus.home>${project.build.directory}/appserver-base</plexus.home>
+            <derby.system.home>${project.build.directory}/appserver-base</derby.system.home>
           </systemPropertyVariables>
         </configuration>