Clean up main suite:
   Fix main.async_client
   Fix main.component-upgrade
   Fix main.connect
   Fix main.grant_alter_user
   Fix main.invalid_collation
   Fix main.mysqlpump_partial_bkp
   Fix main.plugin_auth
   Fix main.populate_charsets
   Fix main.roles-upgrade
   Fix main.sigusr1
   Fix main.system_variable_source
   Fix main.table_open_cache_functionality
   Fix main.user_if_exists
   Fix main.xa_mdl_backup
and some other tests:
   Fix service_sys_var_registration.sys_var_service_cl
   Fix test_services.test_services_threaded
   Fix test_services.test_services
   Fix test_services.test_services_plugin_registry
   Fix binlog.binlog_expire_logs_days_deprecation

Change-Id: I822b5806088b380c35177e27e7fc2f34ae513991