Fix param in create LB Stickyness policy command

[vishesh92]

No description provided.

[sureshanaparti]

code lgtm

[weizhouapache]

any potential regression due to this ?
@vishesh92

[vishesh92]

The issue is that in CloudStack, the map parameter is parsed in different ways. And for this scenario, we need to set name instead of key. So, currently its not working at all.

Ref.:
https://github.com/apache/cloudstack/blob/30e6c224bdd2e33f35349e808ec75428853f2aa0/api/src/main/java/org/apache/cloudstack/api/command/user/loadbalancer/CreateLBStickinessPolicyCmd.java#L72-L73

https://github.com/apache/cloudstack/blob/30e6c224bdd2e33f35349e808ec75428853f2aa0/server/src/main/java/com/cloud/network/lb/LoadBalancingRulesManagerImpl.java#L544-L547

[abh1sar]

LGTM.
Tested with and without the fix

1. Created a load balancer rule on an existing source-NAT public IP
   (createLoadBalancerRule, port 8080 -> 80, roundrobin).
2. Reproduced the pre-fix bug directly: called createLBStickinessPolicy
   with the old encoding (param[0].key=cookie-name&param[0].value=LBCookie).
   Server response:
   "errortext":"Failed : Stickiness policy does not support param name :null"
   • i.e. the server read the param name as null because it looks for
     .name, not .key, exactly the bug this PR fixes.
3. Confirmed the fix: same call with param[0].name=cookie-name instead
   of param[0].key succeeded (jobstatus: 1, policy created).
4. Confirmed the response wrapper fix: called listLBStickinessPolicies
   and got back
   {"listlbstickinesspoliciesresponse":{"count":1,"stickinesspolicies":[...]}}