CFY-1688 fixed tests, added prefix property
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CFY-1688 flake8.
CFY-1688 changed hostname prefix for tests.
CFY-1688 changed the generated hostname to include node's id.
CFY-1688 flake8.
CFY-1688 changed test's blueprint link to plugin.yaml.
Merge pull request #26 from cloudify-cosmo/CFY-1688-manager-blueprint

Cfy 1688 manager blueprint