CFY-729 modified worker_config to cloudify_agent
Merge branch 'develop' into feature/CFY-729-rename-worker-config-to-cloudify-agent
CFY-729 fixed agent installer
CFY-729 fixed agent installer test
Merge pull request #72 from cloudify-cosmo/feature/CFY-729-rename-worker-config-to-cloudify-agent

CFY-729 modified worker_config to cloudify_agent