Fix "slapos-testing: Test kedifa"

Depend on caucase, as it shall be installed before as it is dependency.

software/slapos-testing/software.cfg

@@ -38,6 +38,7 @@ setup = ${caucase-repository:location}
 <= setup-develop-egg
 egg = kedifa
 setup = ${kedifa-repository:location}
+depends = ${caucase-setup:egg}
 
 [slapos.libnetworkcache-setup]
 <= setup-develop-egg