Add support for Azure Functions (#28566)

* add template for az func

* (wip) add basic azure functions support

* add support to add app settings to azure function

* add support for updating based off of app settings

* add integration tests and refactor required param

* support check mode and add facts module

* add test for azure functions facts module

* add necessary checks and registrations for web client

* fix documentation

* change return type from complex to dict

* disable azure_rm_functionapp tests until stable

* remove dict comprehension for py2.6

* pepe has whitespace tumor

.gitignore

@@ -90,3 +90,4 @@ htmlcov/
 .coverage
 # ansible-test coverage results
 test/units/.coverage.*
+/test/integration/cloud-config-azure.yml