software/monitor: Use buildout.hash.cfg

Use _update_hash_filename_ to avoid filename clash with recipes.

software/monitor/buildout.hash.cfg

+# THIS IS NOT A BUILDOUT FILE, despite purposedly using a compatible syntax.
+# The only allowed lines here are (regexes):
+# - "^#" comments, copied verbatim
+# - "^[" section beginings, copied verbatim
+# - lines containing an "=" sign which must fit in the following categorie.
+#   - "^\s*filename\s*=\s*path\s*$" where "path" is relative to this file
+#     Copied verbatim.
+#   - "^\s*hashtype\s*=.*" where "hashtype" is one of the values supported
+#     by the re-generation script.
+#     Re-generated.
+# - other lines are copied verbatim
+# Substitution (${...:...}), extension ([buildout] extends = ...) and
+# section inheritance (< = ...) are NOT supported (but you should really
+# not need these here).
+[template]
+filename = instance.cfg
+md5sum = 1b7d2d097f208f6641bf98a17df079c8
+
+[template-monitor]
+_update_hash_filename_ = instance-monitor.cfg.jinja2
+md5sum = dffe797be3a66d6838ffc70ee8f5f3ff
+
+[template-monitor-distributor]
+_update_hash_filename_ = instance-monitor-distributor.cfg.jinja2
+md5sum = 61c0bfdfc0a2b51ba15fe4a49baf6091
+
+[json-test-template]
+_update_hash_filename_ = json-test-template.json.in.jinja2
+md5sum = 2eb5596544d9c341acf653d4f7ce2680

software/monitor/software.cfg

 [buildout]
 
 extends =
+  buildout.hash.cfg
   ../../component/pycurl/buildout.cfg
   ../../component/python-cryptography/buildout.cfg
   ../../component/wget/buildout.cfg
@@ -19,30 +20,26 @@ parts =
 
 [template]
 recipe = slapos.recipe.template 
-url = ${:_profile_base_location_}/instance.cfg
+url = ${:_profile_base_location_}/${:filename}
 output = ${buildout:directory}/template.cfg
-md5sum = 1b7d2d097f208f6641bf98a17df079c8
 mode = 0644
 
 [template-monitor]
 recipe = slapos.recipe.build:download 
-url = ${:_profile_base_location_}/instance-monitor.cfg.jinja2
+url = ${:_profile_base_location_}/${:_update_hash_filename_}
 destination = ${buildout:directory}/template-base-monitor.cfg
-md5sum = dffe797be3a66d6838ffc70ee8f5f3ff
 mode = 0644
 
 [template-monitor-distributor]
 recipe = slapos.recipe.build:download
-url = ${:_profile_base_location_}/instance-monitor-distributor.cfg.jinja2
+url = ${:_profile_base_location_}/${:_update_hash_filename_}
 destination = ${buildout:directory}/template-monitor-base-distributor.cfg
-md5sum = 61c0bfdfc0a2b51ba15fe4a49baf6091
 mode = 0644
 
 [json-test-template]
 recipe = slapos.recipe.build:download
-url = ${:_profile_base_location_}/json-test-template.json.in.jinja2
+url = ${:_profile_base_location_}/${:_update_hash_filename_}
 destination = ${buildout:directory}/json-test-template.json.in.jinja2
-md5sum = 2eb5596544d9c341acf653d4f7ce2680
 mode = 0644
 
 [network-bench-cfg]