Add missing OPTIONAL_API and ARI dependences.

I've audited all modules that include any header which includes
asterisk/optional_api.h.  All modules which use OPTIONAL_API now declare
those dependencies in AST_MODULE_INFO using requires or optional_modules
as appropriate.

In addition ARI dependency declarations have been reworked.  Instead of
declaring additional required modules in res/ari/resource_*.c we now add
them to an optional array "requiresModules" in api-docs for each module.
This allows the AST_MODULE_INFO dependencies to include those missing
modules.

Change-Id: Ia0c70571f5566784f63605e78e1ceccb4f79c606

rest-api-templates/swagger_model.py

@@ -647,6 +647,7 @@ class ApiDeclaration(Stringify):
         self.api_version = api_decl_json.get('apiVersion')
         self.base_path = api_decl_json.get('basePath')
         self.resource_path = api_decl_json.get('resourcePath')
+        self.requires_modules = api_decl_json.get('requiresModules') or []
         api_json = api_decl_json.get('apis') or []
         self.apis = [
             Api().load(j, processor, context) for j in api_json]