'Returns role spec info
\'scm\': \'git\',
\'src\': \'http://git.example.com/repos/repo.git\',
\'version\': \'v1.0\',
\'name\': \'repo\''

@property
def spec(self):

    return dict(scm=self.scm, src=self.src, version=self.version, name=self.name)
