Allow tolerationSeconds to be empty on Zone tolerations Requests (#238)

Since toleration seconds can be empty, we were forcing it to be an integer defaulting to 0 which
was creating a toleration with value 0 when value should have been nil.

swagger.yml

@@ -2113,14 +2113,7 @@ definitions:
             category.
           type: string
         tolerationSeconds:
-          description: TolerationSeconds represents the period of
-            time the toleration (which must be of effect NoExecute,
-            otherwise this field is ignored) tolerates the taint.
-            By default, it is not set, which means tolerate the taint
-            forever (do not evict). Zero and negative values will
-            be treated as 0 (evict immediately) by the system.
-          format: int64
-          type: integer
+          $ref: "#/definitions/zoneTolerationSeconds"
         value:
           description: Value is the taint value the toleration matches
             to. If the operator is Exists, the value should be empty,
@@ -2128,6 +2121,21 @@ definitions:
           type: string
       type: object
     type: array
+  
+  zoneTolerationSeconds:
+    description: TolerationSeconds represents the period of
+            time the toleration (which must be of effect NoExecute,
+            otherwise this field is ignored) tolerates the taint.
+            By default, it is not set, which means tolerate the taint
+            forever (do not evict). Zero and negative values will
+            be treated as 0 (evict immediately) by the system.
+    type: object
+    required:
+      - seconds
+    properties:
+      seconds:
+        type: integer
+        format: int64
 
   zoneResources:
     description: If provided, use these requests and limit for cpu/memory