testuite/slaprunner: extend erp5/software.cfg

thanks to the shared functionnality of cmmi, the ERP5 building in
webrunner should then be able to reuse these parts instead of
recompiling them

software/erp5testnode/testsuite/slaprunner.cfg

@@ -2,6 +2,7 @@
 extends = 
    ../../slaprunner/development.cfg
    testsuite.cfg
+   ../../software/erp5/software.cfg
 
 parts += template-erp5testnode