Use connection timeout recently added to the MySQL binary log client library

The MySQL binary log client 3rd party library that we're using in the MySQL connector would attempt to open a socket with no timeout, meaning that network issues might make the connection block indefinitely. See this issue for more details.

Version 0.9.0 incorporates a fix that allows us to explicitly set the connect timeout, which defaults to 3 seconds. We should upgrade from 0.8.1 to 0.9.0 to get this new functionality. There are no other changes in 0.9.0.