Stabilize some tests failing after the fix for Bug#20701585.

mysql-test/include/explain_for_connection_small.inc
mysql-test/r/explain_for_connection_small_json.result
   Some statistics are a bit different on 32-bit.  Mask this by replacing
   test output.  Removed the old replace command for this test case since
   it does not seem to be necessary anymore.

mysql-test/include/greedy_search_load_tables.inc
mysql-test/r/greedy_search.result
mysql-test/t/greedy_search.test
   Added ANALYZE TABLE for tables used in this test to get more stable
   statistics.  For Test 2, a typo caused ANALYZE not to be run for
   all tables.  Re-recorded results.