CLOUDIFY-2545 remove debug logging
CLOUDIFY-2545 added plugin.folder into params of plugin installer plugin
CLOUDIFY-2545 pass entire plugin to plugin installer instead of constructing a new minimized object
CLOUDIFY-2545 added installed plugins state in mock plugin installer
CLOUDIFY-2545 allow test to specify worker name to be the node id, just as if it was in production
CLOUDIFY-2545 added test for a blueprint that installs an agent plugin. (now possible to test it)