PT-2138 - fix tests for pt table checksum (#568)

* PT-2138 - Fix tests for pt-table-checksum

- Updated t/pt-table-checksum/samples/default-results-8.0.txt and
t/pt-table-checksum/samples/static-chunk-size-results-8.0.txt
to support latest MySQL 8.0 version. Tests are now incompatible with elder 8.0 releases.
- Put fix for PT-136 into package RowChecksum
- Added execution bit for pt-online-schema-change

* PT-2138 - Fix tests for pt-table-checksum

- Fixed percona_test.load_data, so it really tests if LOAD DATA LOCAL INFILE is enabled
- Fixed option --[no]create-replicate-table, broken by commit c9836d5962

* PT-2138 - Fix tests for pt-table-checksum

- Enabled t/pt-table-checksum/error_handling.t for MySQL 8.0
- Fixed test t/pt-table-checksum/fnv_64.t and it's samples file
t/pt-table-checksum/samples/fnv64-sakila-city.txt
to reflect new function name convention and
changes after 62d84e5dba

* PT-2138 - Fix tests for pt-table-checksum

- Fixed t/pt-table-checksum/issue_1485195.t, so it checks only one table and
isn't get broken when we add tables into percona_test database
- Fixed typo in error output of bin/pt-table-checksum
- Skipped issue_47.t in 8.0 until https://jira.percona.com/browse/PT-1805 is fixed

* PT-2138 - Fix tests for pt-table-checksum

- Disabled pt-131.t for 8.0, because it does not have the QUERY_RESPONSE_TIME plugins
- Added SLOW_TESTS check to pt-1616.t
- Updated pt-226.t to include the fix for PT-1766
- For replication_filters.t: excluded false positive expression for tests 10 and 11 and added sys schema to the list of checked databases for 8.0
- Changed get_slaves in lib/MasterSlave.pm, so it returns slave's parent, required for wait_for_slaves in pt-table-checksum to work properly with chained slaves

* PT-2138 - Fix tests for pt-table-checksum

- Modified pt-204.t  to support 8.0 and diffs in system tables due to timestamps
Moved the fix for PT-1616 into the proper place: lib/NibbleIterator.pm

* PT-2138 - Fix tests for pt-table-checksum

- pxc.t -added mysql.proxies_priv into ignore list, because its timestamp is different on node
- pxc.t - removed FORK=pxc from statup options for slave (non-cluster) nodes
- pxc.t - disabled wsrep replication with help of the variable wsrep_on: sql_log_bin doesn't disable wsrep replication anymore. See https://jira.percona.com/browse/PXC-3464 for details
- Removed data.tar.gz from 5.7 sandbox configuration, because it has an outdated definition for Performance Schema
- Disabled pxc.t for version 8.0 until PT-1699 is fixed
- start-sandbox - removed the first line (ALTER USER) from the init file, because it was rewritten by the next echo command, and then repeated later.

* PT-2138 - Fix tests for pt-table-checksum

- Adopted issue_1485195.t and basics.t for MyRocks-enabled setup
- replication_filters.t - added sys schema to the list of expected schemas for 5.7 and 8.0
- issue_1485195.t - added checks for the existence of mysql.plugin, func, and proxies_priv tables
- added samples/pt-131-wipe.sql that uninstalls QRT plugin if it was earlier installed by this test
-adjusted return code in pt-204.t, because expected differences in mysql.proxies_priv

* Update lib/PerconaTest.pm

removed diagnostic code

Co-authored-by: Carlos Salguero <carlos.salguero@percona.com>

Co-authored-by: Carlos Salguero <carlos.salguero@percona.com>

t/pt-table-checksum/basics.t

@@ -69,11 +69,16 @@ sub reset_repl_db {
 # ############################################################################
 
 # 1
+# We need to remove mysql.plugin and percona_test.checksums tables from the 
+# result and the sample, because they have different number of rows than default
+# if run test with enabled MyRocks or TokuDB SE
 ok(
    no_diff(
       sub { pt_table_checksum::main(@args) },
       "$sample/default-results-$sandbox_version.txt",
-      post_pipe => 'awk \'{print $2 " " $3 " " $4 " " $7 " " $9}\'',
+      sed_out => '\'/mysql.plugin$/d; /percona_test.checksums$/d\'',
+      post_pipe => 'sed \'/mysql.plugin$/d; /percona_test.checksums$/d\' | ' .
+                   'awk \'{print $2 " " $3 " " $4 " " $7 " " $9}\'',
    ),
    "Default checksum"
 );
@@ -88,18 +93,23 @@ my $max_chunks = $sandbox_version < '5.7' ? 60 : 100;
 
 ok(
    $row->[0] > 25 && $row->[0] < $max_chunks,
-   'Between 25 and 60 chunks'
+   "Between 25 and $max_chunks chunks"
 ) or diag($row->[0]);
 
 # ############################################################################
 # Static chunk size (disable --chunk-time)
 # ############################################################################
 # 3
+# We need to remove mysql.plugin and percona_test.checksums tables from the 
+# result and the sample, because they have different number of rows than default
+# if run test with enabled MyRocks or TokuDB SE
 ok(
    no_diff(
       sub { pt_table_checksum::main(@args, qw(--chunk-time 0 --ignore-databases mysql)) },
       "$sample/static-chunk-size-results-$sandbox_version.txt",
-      post_pipe => 'awk \'{print $2 " " $3 " " $4 " " $6 " " $7 " " $9}\'',
+      sed_out => '\'/mysql.plugin$/d; /percona_test.checksums$/d\'',
+      post_pipe => 'sed \'/mysql.plugin$/d; /percona_test.checksums$/d\' | ' .
+                   'awk \'{print $2 " " $3 " " $4 " " $6 " " $7 " " $9}\'',
    ),
    "Static chunk size (--chunk-time 0)"
 );