[services] Move tools to their namespace
Summary:
Depends on D4032
Move all tools to the ::tools namespace
Test Plan: Services still build
Reviewers: palys-swm, geekbrother, ashoat, jimpo, varun
Reviewed By: geekbrother, ashoat
Subscribers: geekbrother, ashoat, palys-swm, Adrian, atul, yayabosh
Differential Revision: https://phabricator.ashoat.com/D4033