drill

97a01b2c - DRILL-3020: Copy cause exception's message to thrown SQLException's message.

DRILL-3020: Copy cause exception's message to thrown SQLException's message. Changed SQLException construction to set SQLException's message to the cause exception's toString(). Also: - Narrowed one SQLException to SQLNonTransientConnectionException (not other two, since unclear whether transient, non-transient, or varied). - Clarified/simplified exception messages. - Fixed message typo.