slapos-master: Enable WC2 by default on slapos master

software/slapos-master/software.cfg

 [buildout]
 extends =
   ../../software/erp5/software.cfg
+  ../../component/wendelin.core/activate-WC2-preview.cfg
   buildout.hash.cfg
 
 parts +=
@@ -14,6 +15,8 @@ parts +=
 [ZODB]
 major = 4-wc2
 
+[erp5-defaults]
+wcfs-enable-default = true
 
 [local-bt5-repository]
 # Same as bt5-repository, but only local repository.