use same variable name everywhere

software/erp5testnode/instance-default.cfg

@@ -43,7 +43,7 @@ ipv6-address = $${slap-network-information:global-ipv6}
 test-suite-master-url = $${slap-parameter:test-suite-master-url}
 bt5-path = $${slap-parameter:additional-bt5-repository-id}
 instance-dict = $${slap-parameter:instance-dict}
-repository-list = $${slap-parameter:vcs-repository-list}
+vcs-repository-list = $${slap-parameter:vcs-repository-list}
 
 git-binary = ${git:location}/bin/git
 slapgrid-partition-binary = ${buildout:bin-directory}/slapgrid-cp