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- Removed data.tar.gz from 5.7 sandbox configuration, because it has an outdated definition for Performance Schema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>

sandbox/servers/pxc/8.0/my.sandbox.cnf

@@ -0,0 +1,43 @@
+[client]
+user     = msandbox
+password = msandbox
+port     = PORT
+socket   = /tmp/PORT/mysql_sandboxPORT.sock
+
+[mysqld]
+port                       = PORT
+socket                     = /tmp/PORT/mysql_sandboxPORT.sock
+pid-file                   = /tmp/PORT/data/mysql_sandboxPORT.pid
+basedir                    = PERCONA_TOOLKIT_SANDBOX
+datadir                    = /tmp/PORT/data
+key_buffer_size            = 16M
+innodb_buffer_pool_size    = 16M
+innodb_data_home_dir       = /tmp/PORT/data
+innodb_log_group_home_dir  = /tmp/PORT/data
+innodb_data_file_path      = ibdata1:10M:autoextend
+innodb_log_file_size       = 5M
+log-bin                    = mysql-bin
+relay_log                  = mysql-relay-bin
+log_slave_updates
+server-id                  = PORT
+report-host                = 127.0.0.1
+report-port                = PORT
+log-error                  = /tmp/PORT/data/mysqld.log
+innodb_lock_wait_timeout   = 3
+general_log
+general_log_file           = genlog
+
+binlog_format              = ROW
+wsrep_provider             = LIBGALERA
+wsrep_cluster_address      = CLUSTER_AD
+wsrep_sst_receive_address  = ADDR:RECEIVE_PRT
+wsrep_node_incoming_address= ADDR:PORT
+wsrep_slave_threads        = 2
+wsrep_cluster_name         = CLUSTER_NAME
+wsrep_provider_options     = "gmcast.listen_addr=tcp://ADDR:LISTEN_PRT;"
+wsrep_sst_method           = xtrabackup-v2
+wsrep_node_name            = PORT
+innodb_autoinc_lock_mode   = 2
+wsrep-replicate-myisam
+pxc_strict_mode            = DISABLED
+pxc_encrypt_cluster_traffic = 0

sandbox/start-sandbox

@@ -164,7 +164,6 @@ make_sandbox() {
 
         $PERCONA_TOOLKIT_BRANCH/util/version_cmp $minor_version 5.7.5
         if [ $? -eq 2 ]; then
-            echo "ALTER USER 'root'@'localhost' IDENTIFIED BY 'msandbox';" > $init_file
             echo "CREATE USER IF NOT EXISTS 'msandbox'@'%';" > $init_file
             echo "ALTER USER 'msandbox'@'%' IDENTIFIED BY 'msandbox' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT UNLOCK;" >> $init_file
             echo "GRANT ALL PRIVILEGES ON *.* TO 'msandbox'@'%';" >> $init_file