PT-2151 fix tests for pt-query-digest (#631)

* PT-2151 - Fix tests for pt-query-digest

Put fix for PT-1908 into the proper place

* PT-2151 - Fix tests for pt-query-digest

Put fix for PT-1554 into the proper place

* PT-2151 - Fix tests for pt-query-digest

Adjusted expected results for the default test t/pt-table-checksum/basics.t, so they do not depend on number of rows in the help tables

* PT-2151 - Fix tests for pt-query-digest

Added additional check for both replicas into t/pt-online-schema-change/preserve_triggers.t to avoid deadlock when ->ok() is doing CHECKSUM

* PT-2151 - Fix tests for pt-query-digest

Added delay to t/pt-table-sync/wait.t, so it waits for the child process to start lagging

* PT-2151 - Fix tests for pt-query-digest

Updated t/pt-query-digest/samples/issue_1196-output-8.0.txt, so it reflects changes in the latest 8.0

* PT-2151 - Fix tests for pt-query-digest

Updated queries against query history table, so they don't fail after e2cf183762

* PT-2151 - Fix tests for pt-query-digest

Fixed PT-813 by comparing query text. Since order itself does not matter, it is not essential to compare by the fingerprint or use any other function that changes the query.

* PT-2151 - Fix tests for pt-query-digest

Adjusted samples files which now should have consistent order after fix for PT-813

* PT-2151 - Fix tests for pt-query-digest

Fixed typo in the SELECT query in the QueryReview package

* PT-2151 - Fix tests for pt-query-digest

Fix for PT-981

* PT-2151 - Fix tests for pt-query-digest

Updated modules for pt-index-usage and fixed tests, because checksum is calculated differently after fix for PT-1554

* PT-2151 - Fix tests for pt-query-digest

Updated modules for pt-diskstats, pt-fk-error-logger, pt-heartbeat, pt-online-schema-change, pt-slave-delay, pt-slave-find, pt-table-checksum, pt-table-sync, pt-upgrade

* PT-2151 - Fix tests for pt-query-digest

Updated lib/IndexUsage.pm, so fix for pt-index-usage is in the correct place

t/pt-query-digest/samples/issue_1196-output-8.0.txt

@@ -1,8 +1,8 @@
 
 # Profile
-# Rank Query ID                           Response time Calls R/Call V/M  
-# ==== ================================== ============= ===== ====== =====
-#    1 0x867E8F0D95B72228D4B6A5CD2F2F485C 0.2148 100.0%     1 0.2148  0.00 SELECT t
+# Rank Query ID                            Response time Calls R/Call V/M 
+# ==== =================================== ============= ===== ====== ====
+#    1 0x867E8F0D95B72228D4B6A5CD2F2F485C  0.2148 100.0%     1 0.2148  0.00 SELECT t
 
 # Query 1: 0 QPS, 0x concurrency, ID 0x867E8F0D95B72228D4B6A5CD2F2F485C at byte 0
 # This item is included in the report because it matches --limit.
@@ -59,4 +59,4 @@ select t.a, count(*) from t join t t2 using(a) group by 1 order by 2 desc limit
 #           ref: NULL
 #          rows: 14
 #      filtered: 10.00
-#         Extra: Using where; Using join buffer (Block Nested Loop)
+#         Extra: Using where; Using join buffer (hash join)