Product license verification in Console (#518)

Operator UI - Provide and store License key
- New License section in Operator UI will allow user to provide the
  license key via input form
- New License section in Operator UI will allow the user to fetch the
  license key using subnet credentials
-  Console backend has to verify provided license is valid -
   https://godoc.org/github.com/minio/minio/pkg/licverifier#example-package
-  Console backend has to store the license key in k8s secrets

Operator UI - Set license to tenant during provisioning
- Check if license key exists in k8s secret during tenant creation
- If License is present attach the license-key jwt to the new console
tenant via an environment variable

Operator UI - Set license for an existing tenant
- Tenant view will display information about the current status of the
  Tenant License
- If Tenant doesn't have a License then Operator-UI will allow to attach
new license by clicking the Add License button
- Console backend will extract the license from the k8s secret and save
the license-key jwt in the tenant console environment variable and
redeploy

swagger.yml

@@ -1450,6 +1450,68 @@ paths:
       tags:
         - AdminAPI
 
+  /subscription/info:
+    get:
+      summary: Subscription info
+      operationId: SubscriptionInfo
+      responses:
+        200:
+          description: A successful response.
+          schema:
+            $ref: "#/definitions/license"
+        default:
+          description: Generic error response.
+          schema:
+            $ref: "#/definitions/error"
+      tags:
+        - AdminAPI
+
+  /subscription/validate:
+    post:
+      summary: Validate a provided subscription license
+      operationId: SubscriptionValidate
+      parameters:
+        - name: body
+          in: body
+          required: true
+          schema:
+            $ref: "#/definitions/subscriptionValidateRequest"
+      responses:
+        200:
+          description: A successful response.
+          schema:
+            $ref: "#/definitions/license"
+        default:
+          description: Generic error response.
+          schema:
+            $ref: "#/definitions/error"
+      tags:
+        - AdminAPI
+
+
+  /subscription/namespaces/{namespace}/tenants/{tenant}/activate:
+    post:
+      summary: Activate a particular tenant using the existing subscription license
+      operationId: SubscriptionActivate
+      parameters:
+      - name: namespace
+        in: path
+        required: true
+        type: string
+      - name: tenant
+        in: path
+        required: true
+        type: string
+      responses:
+        204:
+          description: A successful response.
+        default:
+          description: Generic error response.
+          schema:
+            $ref: "#/definitions/error"
+      tags:
+        - AdminAPI
+
   /admin/info:
     get:
       summary: Returns information about the deployment
@@ -2553,6 +2615,8 @@ definitions:
       status:
         type: string
         enum: [ok]
+      operator:
+        type: boolean
   adminInfoResponse:
     type: object
     properties:
@@ -2779,7 +2843,8 @@ definitions:
         format: int64
       enable_prometheus:
         type: boolean
-
+      subnet_license:
+        $ref: "#/definitions/license"
   tenantUsage:
     type: object
     properties:
@@ -3717,3 +3782,29 @@ definitions:
       restart:
         description: Returns wheter server needs to restart to apply changes or not
         type: boolean
+        
+
+  subscriptionValidateRequest:
+    type: object
+    properties:
+      license:
+        type: string
+      email:
+        type: string
+      password:
+        type: string
+  license:
+    type: object
+    properties:
+      email:
+        type: string
+      organization:
+        type: string
+      account_id:
+        type: integer
+      storage_capacity:
+        type: integer
+      plan:
+        type: string
+      expires_at:
+        type: string