Added fix for optional weight attribute's value (#3684)

* Fix for optional weight attribute's value

Fix for optional weight attr set to 0 when not provided.

* ssh key removal

* weight default info added in docs

weight default info added in docs.

* upd docs

upd docs

website/docs/r/is_lb_pool_member.html.markdown

@@ -63,7 +63,9 @@ Review the argument references that you can specify for your resource.
 - `port`- (Required, Integer) The port number of the application running in the server member.
 - `target_address` - (Required, String) The IP address of the pool member.
 - `target_id` - (Required, String) The unique identifier for the virtual server instance pool member. Required for network load balancer.
-- `weight` - (Optional, Integer) Weight of the server member. This option takes effect only when the load-balancing algorithm of its belonging pool is `weighted_round_robin`, Minimum allowed weight is `0` and Maximum allowed weight is `100`. When weight is not provided a default of 40 is returned.
+
+- `weight` - (Optional, Integer) Weight of the server member. This option takes effect only when the load-balancing algorithm of its belonging pool is `weighted_round_robin`, Minimum allowed weight is `0` and Maximum allowed weight is `100`. Default: 50, Weight of the server member. Applicable only if the pool algorithm is weighted_round_robin.
+
 
 ## Attribute reference
 In addition to all argument reference list, you can access the following attribute reference after your resource is created.