[merge] look for plugins in arch-independent site directory (was Re: Bundling more plugins into bzrtools)

[Alexander Belchenko]

Alexander Belchenko has voted comment.
Status is now: Waiting
Comment:
I'm not sure that new test 
test_set_plugins_path_includes_arch_indep_directory is needed. It 
basically repeats the same logic as in real code, so it's not clear for 
me why we need it. Also I noticed that old test that failed has their 
own implementation for preserving environment variable. It seems for me 
as thinko (accroding to abentley). We already have mechanics in TestCase 
to automatically clean environment and restore it back after each test.
Hm, may be I need to update your patch myself.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C47C31F5C.4050607%40gmail.com%3E