API Doc: Adding the messaging_service swagger definition
API Doc: Adding the messaging_service swagger definition

This adds the messaging_service API definition it will expose the
messaging_service metrics.

Signed-off-by: Amnon Heiman <ed5fc74c4692051ad0b19749fd7cea6ec2d74b9e@cloudius-systems.com>

aruanruan/scylla,scylladb/scylla,stamhe/scylla,linearregression/scylla,kangkot/scylla,kjniemi/scylla,raphaelsc/scylla,dwdm/scylla,eklitzke/scylla,linearregression/scylla,rluta/scylla,justintung/scylla,bowlofstew/scylla,respu/scylla,avikivity/scylla,respu/scylla,bowlofstew/scylla,stamhe/scylla,kjniemi/scylla,stamhe/scylla,acbellini/scylla,glommer/scylla,tempbottle/scylla,dwdm/scylla,duarten/scylla,justintung/scylla,rluta/scylla,capturePointer/scylla,dwdm/scylla,duarten/scylla,linearregression/scylla,senseb/scylla,victorbriz/scylla,avikivity/scylla,scylladb/scylla,gwicke/scylla,shaunstanislaus/scylla,raphaelsc/scylla,duarten/scylla,victorbriz/scylla,respu/scylla,glommer/scylla,phonkee/scylla,aruanruan/scylla,aruanruan/scylla,gwicke/scylla,tempbottle/scylla,shaunstanislaus/scylla,capturePointer/scylla,avikivity/scylla,asias/scylla,acbellini/scylla,bowlofstew/scylla,asias/scylla,gwicke/scylla,acbellini/scylla,justintung/scylla,asias/scylla,guiquanz/scylla,rentongzhang/scylla,victorbriz/scylla,scylladb/scylla,senseb/scylla,raphaelsc/scylla,rentongzhang/scylla,eklitzke/scylla,shaunstanislaus/scylla,eklitzke/scylla,wildinto/scylla,capturePointer/scylla,phonkee/scylla,wildinto/scylla,kangkot/scylla,scylladb/scylla,kjniemi/scylla,phonkee/scylla,senseb/scylla,rluta/scylla,glommer/scylla,rentongzhang/scylla,kangkot/scylla,guiquanz/scylla,guiquanz/scylla,tempbottle/scylla,wildinto/scylla