1870: update mysql jdbc driver version
1870: update mysql jdbc driver version

LibrePlan/libreplan,LibrePlan/libreplan,LibrePlan/libreplan,LibrePlan/libreplan,poum/libreplan,poum/libreplan,LibrePlan/libreplan,LibrePlan/libreplan,poum/libreplan,LibrePlan/libreplan,poum/libreplan,poum/libreplan,poum/libreplan