'Creates a new stack using the template provided.
Note that at this stage the template has already been fetched from the
heat-api process if using a template-url.
:param ctxt: RPC context.
:param stack_name: Name of the stack you want to create.
:param template: Template of stack you want to create.
:param params: Stack Input Params/Environment
:param files: files referenced from the environment.
:param args: Request parameters/args passed from API
:param environment_files: optional ordered list of environment file
names included in the files dict
:type  environment_files: list or None'

def create_stack(self, ctxt, stack_name, template, params, files, args, environment_files=None):

    return self._create_stack(ctxt, stack_name, template, params, files, args, environment_files=environment_files)
