kishorj: Update default cluster version for e2e tests

JobBuild
2659
05-24 21:13
pull-aws-load-balancer-controller-e2e-test 1548005045994262528 1547253354231500800 1529264254425763840 1529233572785819648 1529209000111902720
pull-aws-load-balancer-controller-lint 1548005045910376448 1547253354147614720 1529264254354460672 1529233572718710784 1529209000040599552
pull-aws-load-balancer-controller-unit-test 1548005045952319488 1547253354189557760 1529264254392209408 1529233572752265216 1529209000078348288