test: update test volume size to 1G and 2G
test: update test volume size to 1G and 2G

EBS volume has to be multiple of 1G


aruneli/convoy,rancherio/volmgr,medallia/convoy,rancher/convoy,rancherio/volmgr,rancher/rancher-volume,jinuxstyle/convoy,rancher/convoy,rancher/convoy,aruneli/convoy,rancherio/rancher-volume,aruneli/convoy,rancher/rancher-volume,rancher/rancher-volume,rancherio/rancher-volume,medallia/convoy,rancherio/volmgr,nickvanw/convoy,rancherio/rancher-volume,nickvanw/convoy,medallia/convoy,nickvanw/convoy,jinuxstyle/convoy,jinuxstyle/convoy