Simplify agent's instance.cfg.

- rootdirectory section is implicitely pulled by instance section, so do
  not name it in parts.
- merge rootdirectory entries, as mkdirectory created intermediate
  directories implicitly and those entries were not used

software/agent/instance.cfg

 [buildout]
 parts =
-  rootdirectory
   instance
 
 eggs-directory = ${buildout:eggs-directory}
@@ -20,10 +19,7 @@ path_file = $${rootdirectory:srv}/path.cfg
 
 [rootdirectory]
 recipe = slapos.cookbook:mkdirectory
-etc = $${buildout:directory}/etc
-run = $${rootdirectory:etc}/run
-var = $${buildout:directory}/var
-log = $${rootdirectory:var}/log
-agentlog = $${rootdirectory:log}/agent
+run = $${buildout:directory}/etc/run
+agentlog = $${buildout:log}/var/log/agent
 srv = $${buildout:directory}/srv
 bin = $${buildout:directory}/bin

software/agent/software.cfg

@@ -26,7 +26,7 @@ eggs = ${instance-recipe:egg}
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/instance.cfg
 output = ${buildout:directory}/template.cfg
-md5sum = 37b8a63db625fc9a205a0fde90797c74
+md5sum = 361004653bd343fe06766eef82958ccd
 mode = 0644
 
 [eggs]