Fixes fork for mysql 5.7
Fixes fork for mysql 5.7

In mysql 5.7 the sql_mode ONLY_FULL_GROUP_BY was enabled by default. This didn't work together with some old queries in fork
This should remove that from the session configuration so fork works on mysql 5.7 while we migrate to depricating SpoonDatabase
in favour of Doctrine

mathiashelin/forkcms,jonasdekeukelaere/forkcms,Thijzer/forkcms,DegradationOfMankind/forkcms,jessedobbelaere/forkcms,vytenizs/forkcms,bartdc/forkcms,jacob-v-dam/forkcms,justcarakas/forkcms,jacob-v-dam/forkcms,dmoerman/forkcms,jonasdekeukelaere/forkcms,vytenizs/forkcms,vytsci/forkcms,jeroendesloovere/forkcms,sumocoders/forkcms,jeroendesloovere/forkcms,jessedobbelaere/forkcms,tommyvdv/forkcms,jeroendesloovere/forkcms,vytsci/forkcms,Katrienvh/forkcms,sumocoders/forkcms,jonasdekeukelaere/forkcms,bartdc/forkcms,jonasdekeukelaere/forkcms,Thijzer/forkcms,justcarakas/forkcms,riadvice/forkcms,vytenizs/forkcms,Katrienvh/forkcms,riadvice/forkcms,vytsci/forkcms,sumocoders/forkcms,Katrienvh/forkcms,mathiashelin/forkcms,dmoerman/forkcms,DegradationOfMankind/forkcms,carakas/forkcms,carakas/forkcms,jacob-v-dam/forkcms,Katrienvh/forkcms,riadvice/forkcms,tommyvdv/forkcms,sumocoders/forkcms,jeroendesloovere/forkcms,carakas/forkcms,jessedobbelaere/forkcms,sumocoders/forkcms,mathiashelin/forkcms,jonasdekeukelaere/forkcms,DegradationOfMankind/forkcms,carakas/forkcms,forkcms/forkcms,forkcms/forkcms,tommyvdv/forkcms,riadvice/forkcms,tommyvdv/forkcms,jacob-v-dam/forkcms,dmoerman/forkcms,forkcms/forkcms,jessedobbelaere/forkcms,mathiashelin/forkcms,justcarakas/forkcms,forkcms/forkcms,Thijzer/forkcms,DegradationOfMankind/forkcms,carakas/forkcms,bartdc/forkcms