modified six library dependency to use >=1.8.0 rather than ==1.8.0, due to conflicts with other dependencies
modified six library dependency to use >=1.8.0 rather than ==1.8.0, due to conflicts with other dependencies

cloudify-cosmo/cloudify-fabric-plugin,denismakogon/cloudify-fabric-plugin,cloudify-cosmo/cloudify-fabric-plugin,denismakogon/cloudify-fabric-plugin