Unzip all eggs.

This is workaround for SlapOS limitation of development environment.

software/erp5/software.cfg

@@ -19,6 +19,11 @@ parts +=
 # Create instance template
   template
 
+# XXX: Workaround of SlapOS limitation
+# Unzippig of eggs is required, as SlapOS do not yet provide nicely working
+# development / fast switching environment for whole software
+unzip = true
+
 [instance-recipe]
 # Note: In case if specific instantiation recipe is used this is the place to
 # put its name