Coverity issues in contrail-controller/dns_mgr.cc
Coverity issues in contrail-controller/dns_mgr.cc

I have run Coverity on branch R5.0 and it reported the following issues in contrail-controller/dns_mgr.cc:
- Variable resp going out of scope leaks the storage it points to in dns_mgr.cc:DnsManager::BindPendingMsgHandler
- Variable resp going out of scope leaks the storage it points to in dns_mgr.cc:DnsManager::VdnsRecordsMsgHandler

Indeed, in both functions (BindPendingMsgHandler and VdnsRecordsMsgHandler),
variable resp is not freed on else branch.

Change-Id: I52a4212777a352e0a7efbf02907db7987b8bc06a
Closes-Bug: #1770152
Signed-off-by: Anda Nicolae <31a050c5ab5e18545e3d5420b0dac4e4b12c44c7@lenovo.com>

eonpatapon/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller