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

test/integration/targets/azure_rm_functionapp/aliases

@@ -0,0 +1,2 @@
+cloud/azure
+destructive

test/integration/targets/azure_rm_functionapp/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - setup_azure

test/integration/targets/azure_rm_functionapp/tasks/main.yml

@@ -0,0 +1,82 @@
+- name: create storage account for function apps
+  azure_rm_storageaccount:
+    resource_group: '{{ resource_group }}'
+    name: azfunccistor4
+    account_type: Standard_LRS
+
+- name: create basic function app
+  azure_rm_functionapp:
+    resource_group: '{{ resource_group }}'
+    name: azfuncci
+    storage_account: azfunccistor4
+  register: output
+
+- name: assert the function was created
+  assert:
+    that: output.changed
+
+- name: list facts for function
+  azure_rm_functionapp_facts:
+    resource_group: '{{ resource_group }}'
+    name: azfuncci
+
+- name: assert the facts were retrieved
+  assert:
+    that: '{{ ansible_facts.azure_functionapps|length == 1 }}'
+
+- name: delete basic function app
+  azure_rm_functionapp:
+    resource_group: '{{ resource_group }}'
+    name: azfuncci
+    state: absent
+  register: output
+
+- name: assert the function was deleted
+  assert:
+    that: output.changed
+
+- name: create a function with app settings
+  azure_rm_functionapp:
+    resource_group: '{{ resource_group }}'
+    name: azfuncci
+    storage_account: azfunccistor4
+    app_settings:
+      hello: world
+      things: more stuff
+  register: output
+
+- name: assert the function with app settings was created
+  assert:
+    that: output.changed
+
+- name: change app settings
+  azure_rm_functionapp:
+    resource_group: '{{ resource_group }}'
+    name: azfuncci
+    storage_account: azfunccistor4
+    app_settings:
+      hello: world
+      things: more stuff
+      another: one
+  register: output
+
+- name: assert the function was changed
+  assert:
+    that: output.changed
+
+- name: delete the function app
+  azure_rm_functionapp:
+    resource_group: '{{ resource_group }}'
+    name: azfuncci
+    state: absent
+  register: output
+
+- name: assert the function was deleted
+  assert:
+    that: output.changed
+
+- name: delete storage account
+  azure_rm_storageaccount:
+    resource_group: '{{ resource_group }}'
+    name: azfunccistor4
+    state: absent