Fake http_connect in test_replicator test

- mock http_connect in replicator.test_delete_partition test to not
  connect directly on 127.0.0.1 (which is not always avail on non
  linuxies).
- Fixes bug 1203907

Change-Id: I2622223c9fe5a3db2a113b6cd8d028a5db0915a7
Merge "Fake http_connect in test_replicator test"