change spark version in ec2.py to 1.1.0 from 1.0.2
change spark version in ec2.py to 1.1.0 from 1.0.2

kcompher/thunder,kunallillaney/thunder,j-friedrich/thunder,jwittenbach/thunder,kunallillaney/thunder,poolio/thunder,thunder-project/thunder,zhwa/thunder,pearsonlab/thunder,mikarubi/thunder,broxtronix/thunder,zhwa/thunder,oliverhuangchao/thunder,kcompher/thunder,poolio/thunder,j-friedrich/thunder,broxtronix/thunder,pearsonlab/thunder,mikarubi/thunder,oliverhuangchao/thunder