Lookups: use Ansible's config manager whenever possible (#5440)

* Start using Ansible's config manager to handle options.

* Docs improvements.

* Fix documentation, make options actual lookup options.

* The cyberarkpassword lookup does too strange things.

* The onepassword lookups are converted in #4728, let's not interfere.

* Improve docs.

* Skip shelvefile as well.

* Convert lmdb_kv.

* Convert and fix credstash.

* Convert manifold.

* Drop chef_databag.

* Convert dig.

* Update examples.

* Forgot the most important part.

* Fix lmdb_kv docs.

* Python 2.6 compatibility.

* Convert AnsibleUnicode to str.

* Load lookup with lookup loader.

* Fix environment handling and error message checking.

* Improve docs formatting.

plugins/lookup/dependent.py

@@ -16,7 +16,7 @@ description:
      or template expressions which evaluate to lists or dicts, composed of the elements of
      the input evaluated lists and dictionaries."
 options:
-  _raw:
+  _terms:
     description:
       - A list where the elements are one-element dictionaries, mapping a name to a string, list, or dictionary.
         The name is the index that is used in the result object. The value is iterated over as described below.
@@ -180,6 +180,8 @@ class LookupModule(LookupBase):
 
     def run(self, terms, variables=None, **kwargs):
         """Generate list."""
+        self.set_options(var_options=variables, direct=kwargs)
+
         result = []
         if len(terms) > 0:
             templar = Templar(loader=self._templar._loader)