[MERGE] Add builtin subunit support.

[John Arbash Meinel]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Robert Collins wrote:
> This adds builtin support for giving test output via subunit. I did have
> it as a plugin but its turned out to be a 'requirement' (easiest thing
> to use :P) for parallel testing, so I'd like to just make it part of the
> core testing facilities we have.
> 
> -Rob
> 

BB:tweak

Overall I'm fine with bringing this in. My only concern is this:
+        if subunit:
+            from bzrlib.tests import SubUnitBzrRunner
+            self.additional_selftest_args['runner_class'] =
SubUnitBzrRunner

^- If subunit isn't available you get an ugly import error trying to get
SubUnitBzrRunner.

I'd rather you wrap this into a BzrCommandError('--subunit requested but
could not find the python module subunit')

or something along those lines.

John
=:->

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (Cygwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAknC/DwACgkQJdeBCYSNAAO+UgCfcD9gcsbOCSkZpvJzG2Z1sLae
tEMAoKoiJHPdGEGKSFhS2qjrIHyBhauH
=ej4j
-----END PGP SIGNATURE-----