Plugins » Foreman Remote Execution

Fixes #13240 - ability to render one template from another

Usage:

In template, on can reference another template by using:

```
render_template("Run Command - SSH Default", 'command' => 'hello world')
```

It's also possible to import inputs defined on one template into another.
It's done by adding 'Foreign Input Set' to the template (in the job tab under
inputs definition). One can either load all inputs from the target template,
define some exceptions (values that will be overridden by the template and
makes no sense to ask user for them) or explicitly include some.

By default, when rendering a sub-template, it looks at the foreign input sets
and uses the values when a match is found. To explicitly provide
the values regardless of the foreign input sets one can use:

```
render_template("Run Command - SSH Default", {'command' => 'hello world'}, { :with_foreign_input_set => false })
```

In the current behaviour, we check that two inputs with the same name are
not included twice in the template (we need to do it both on template
preparation validation, as well as at job invocation time to cover some edge
cases).

Merge pull request #119 from iNecas/include_template

Fixes #13240 - ability to render one template from another