[ReleasePR serialconsole] [Hub Generated] Review request for Microsoft.SerialConsole to add version stable/2018-05-01 (#1456)

Create to sync Azure/azure-rest-api-specs#12109
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/master...AzureSDKAutomation:sdkAuto/serialconsole?expand=1)

Author: msftbot[bot]

schemas/2018-05-01/Microsoft.SerialConsole.json

@@ -0,0 +1,71 @@
+{
+  "id": "https://schema.management.azure.com/schemas/2018-05-01/Microsoft.SerialConsole.json#",
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "Microsoft.SerialConsole",
+  "description": "Microsoft SerialConsole Resource Types",
+  "resourceDefinitions": {},
+  "extension_resourceDefinitions": {
+    "serialPorts": {
+      "type": "object",
+      "properties": {
+        "apiVersion": {
+          "type": "string",
+          "enum": [
+            "2018-05-01"
+          ]
+        },
+        "name": {
+          "type": "string",
+          "description": "The name of the serial port to create."
+        },
+        "properties": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/SerialPortProperties"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "The properties of the serial port."
+        },
+        "type": {
+          "type": "string",
+          "enum": [
+            "Microsoft.SerialConsole/serialPorts"
+          ]
+        }
+      },
+      "required": [
+        "apiVersion",
+        "name",
+        "properties",
+        "type"
+      ],
+      "description": "Microsoft.SerialConsole/serialPorts"
+    }
+  },
+  "definitions": {
+    "SerialPortProperties": {
+      "type": "object",
+      "properties": {
+        "state": {
+          "oneOf": [
+            {
+              "type": "string",
+              "enum": [
+                "enabled",
+                "disabled"
+              ]
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Specifies whether the port is enabled for a serial console connection."
+        }
+      },
+      "description": "The properties of the serial port."
+    }
+  }
+}