[PATCH] tests: fix the test for pypy

[Maciej Fijalkowski]

# HG changeset patch
# User Maciej Fijalkowski <fijall at gmail.com>
# Date 1459856658 -10800
#      Tue Apr 05 14:44:18 2016 +0300
# Node ID ce57e420902bbf79c03edaef7948f1744e7665d8
# Parent  21b2a34556ac42e22f6350827e2168cfdbbf72d1
tests: fix the test for pypy

This test relies on the exact details of random.sample
given the seed. Things work a bit differently under pypy,
make the test less specific

diff -r 21b2a34556ac -r ce57e420902b tests/test-setdiscovery.t
--- a/tests/test-setdiscovery.t	Tue Apr 05 10:59:46 2016 +0300
+++ b/tests/test-setdiscovery.t	Tue Apr 05 14:44:18 2016 +0300
@@ -317,13 +317,13 @@
   query 3; still undecided: 1140, sample size is: 200
   sampling from both directions
   searching: 4 queries
-  query 4; still undecided: 592, sample size is: 200
+  query 4; still undecided: \d+, sample size is: 200 (re)
   sampling from both directions
   searching: 5 queries
-  query 5; still undecided: 292, sample size is: 200
+  query 5; still undecided: \d+, sample size is: 200 (re)
   sampling from both directions
   searching: 6 queries
-  query 6; still undecided: 51, sample size is: 51
+  query 6; still undecided: \d+, sample size is: \d+ (re)
   6 total queries
   common heads: 3ee37d65064a