classify: fix sesssion details api
classify: fix sesssion details api

We were not allocating space for the
variable length payload in the response
message.

Type: fix

Change-Id: I345102f4555f66c5632ab0882ca1dd178e98eb7b
Signed-off-by: Nathan Skrzypczak <0fa918c439baf617eab84c5ae2a48ee9db643966@gmail.com>

FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp