test-lfs: avoid pagination

Otherwise, the pagination can trigger in when running the test with --debug,
blocking the test execution for no good reason.

Differential Revision: https://phab.mercurial-scm.org/D10395

tests/test-lfs-test-server.t

@@ -40,6 +40,8 b''
 #endif
 
   $ cat >> $HGRCPATH <<EOF
+  > [ui]
+  > paginate=no
   > [experimental]
   > lfs.worker-enable = False
   > [extensions]