[PATCH FOLLOW-UP] test: follow-up on 1c4d6ab2ecb8, stabilize test-remotefilelog-bgprefetch.t

[Boris Feld]

# HG changeset patch
# User Boris Feld <boris.feld at octobus.net>
# Date 1551081749 -3600
#      lun. févr. 25 09:02:29 2019 +0100
# Node ID f611bf911c863d35aced20dfb2546725c911a722
# Parent  1c1c4ef8b72e39f5ed1c62dc4e31e02e9e08b652
# EXP-Topic stabilize-test-remotefilelog-bgprefetch.t
# Available At https://bitbucket.org/octobus/mercurial-devel/
#              hg pull https://bitbucket.org/octobus/mercurial-devel/ -r f611bf911c86
test: follow-up on 1c4d6ab2ecb8, stabilize test-remotefilelog-bgprefetch.t

In 1c4d6ab2ecb8, I've added some sleeps after about half of the calls to `hg
debugwaitonrepack` but it seems the other calls are also flaky as catched by
our CI: https://ci.octobus.net/job/MercurialPy2/299/console. Add sleeps after
all calls in order to be safe.

diff --git a/tests/test-remotefilelog-bgprefetch.t b/tests/test-remotefilelog-bgprefetch.t
--- a/tests/test-remotefilelog-bgprefetch.t
+++ b/tests/test-remotefilelog-bgprefetch.t
@@ -142,6 +142,7 @@
   $ hg debugwaitonprefetch >/dev/null 2>%1
   $ sleep 1
   $ hg debugwaitonrepack >/dev/null 2>%1
+  $ sleep 1
   $ find $CACHEDIR -type f | sort
   $TESTTMP/hgcache/master/packs/8f1443d44e57fec96f72fb2412e01d2818767ef2.histidx
   $TESTTMP/hgcache/master/packs/8f1443d44e57fec96f72fb2412e01d2818767ef2.histpack
@@ -287,6 +288,7 @@
 
   $ sleep 0.5
   $ hg debugwaitonrepack >/dev/null 2>%1
+  $ sleep 0.5
 
   $ find $CACHEDIR -type f | sort
   $TESTTMP/hgcache/master/packs/8f1443d44e57fec96f72fb2412e01d2818767ef2.histidx
@@ -331,6 +333,7 @@
   * files fetched over 1 fetches - (* misses, 0.00% hit ratio) over *s (glob) (?)
   $ sleep 0.5
   $ hg debugwaitonrepack >/dev/null 2>%1
+  $ sleep 0.5
 
   $ find $CACHEDIR -type f | sort
   $TESTTMP/hgcache/master/packs/8f1443d44e57fec96f72fb2412e01d2818767ef2.histidx