revise argument to mysqlclient/pymysql ping

revise argument to mysqlclient/pymysql ping

Repaired a new incompatibility in the MySQL "pre-ping" routine where the
``False`` argument passed to ``connection.ping()``, which is intended to
disable an unwanted "automatic reconnect" feature,  is being deprecated in
MySQL drivers and backends, and is producing warnings for some versions of
MySQL's native client drivers.  It's removed for mysqlclient, whereas for
PyMySQL and drivers based on PyMySQL, the parameter will be deprecated and
removed at some point, so API introspection is used to future proof against
these various stages of removal.

Fixes: #10492
Change-Id: I8a52428c6f93a03b66a605cb0b85cc5924803d6d
references: #10489