CFY-1184 added ec2 cleanup context and handler
CFY-1184 added cloudify ec2 config, and suite to suites.json
CFY-1184 added ec2 config and changed system tests script to install only the appropriate provider.
CFY-1184 added ec2 nodecellar test
CFY-1184 flake8
CFY-1184 changed error raised to AttributeError
CFY-1184 removed comments and names from blueprint
CFY-1184 removed hardcoded names and moved to using nightly builds
CFY-1184 changed test to modify blueprint according to properties specified in handler rather then using values from blueprint
CFY-1184 init boto client using credentials from config file
CFY-1184 added libcloud provider to project dependencies, and the appropriate pip installations to system_tests script and requires env vars.
CFY-1184 bug fix and refactoring
Merge pull request #43 from cloudify-cosmo/CFY-1184-ec2-test-framework

Cfy 1184 ec2 test framework, reviewed by Dan