Remove integration-1.9-mysql
Remove integration-1.9-mysql

1.9 is only supported for CLI, no need to test DB integration
with 1.9

Signed-off-by: Shatarupa Nandi <3efeaa499e3e1d586e0cf648346ba222fe46816b@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh