Pass parameter to fabric task

Fabric 2 task arguments documentation:

http://docs.pyinvoke.org/en/latest/concepts/invoking-tasks.html#task-command-line-arguments

Fabric 1.X uses the following syntax for passing arguments to tasks:

 fab task:'hello world'
 fab task:something='hello'
 fab task:foo=99,bar=True
 fab task:foo,bar

You can read more about it in Fabric docs.