repoview: make propertycache.setcache compatible with repoview Propertycache used standard attribute assignment. In the repoview case, this assignment was forwarded to the unfiltered repo. This result in: (1) unfiltered repo got a potentially wrong cache value, (2) repoview never reused the cached value. This patch replaces the standard attribute assignment by an assignment to `objc.__dict__` which will bypass the `repoview.__setattr__`. This will not affects other `propertycache` users and it is actually closer to the semantic we need. The interaction of `propertycache` and `repoview` are now tested in a python test file.

--- a/mercurial/util.py	Tue Oct 01 16:41:04 2013 -0300
+++ b/mercurial/util.py	Mon Sep 30 14:36:11 2013 +0200
@@ -279,7 +279,8 @@
         return result
 
     def cachevalue(self, obj, value):
-        setattr(obj, self.name, value)
+        # __dict__ assigment required to bypass __setattr__ (eg: repoview)
+        obj.__dict__[self.name] = value
 
 def pipefilter(s, cmd):
     '''filter string S through command CMD, returning its output'''