Fix for MySQL server update and storage_mb (#51661)

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

@@ -63,6 +63,38 @@
       - output.changed == false
       - output.state == 'Ready'
 
+- name: Update instance of MySQL Server, change storage size
+  azure_rm_mysqlserver:
+    resource_group: "{{ resource_group }}"
+    name: mysqlsrv{{ rpfx }}
+    sku:
+      name: B_Gen5_1
+      tier: Basic
+    location: westus2
+    storage_mb: 128000
+    version: 5.6
+    enforce_ssl: True
+    admin_username: zimxyz
+    admin_password: Testpasswordxyz12!
+  register: output
+- name: Assert the state has not changed
+  assert:
+    that:
+      - output.changed
+      - output.state == 'Ready'
+- debug:
+    var: output
+
+- name: Gather facts MySQL Server
+  azure_rm_mysqlserver_facts:
+    resource_group: "{{ resource_group }}"
+    name: mysqlsrv{{ rpfx }}
+  register: output
+- name: Assert that storage size is correct
+  assert:
+    that:
+      - output.servers[0]['storage_mb'] == 128000
+
 - name: Create second instance of MySQL Server
   azure_rm_mysqlserver:
     resource_group: "{{ resource_group }}"