Blob, backup, and tunnelbroker all had a duplicated
DatabaseEntitiesTools.h. This prunes the duplicated file which was
added in D4489 to services/lib

Depends on D4489

Docker workflow:

cd services/base-image
docker build -t commapp/services-base . -f Dockerfile

cd ../..
docker build . -f services/tunnelbroker/Dockerfile

Before this is merged, base-image will need to be updated to reference
new docker hub image

Nix worfklow

nix develop
cd services/tunnelbroker
mkdir build && cd build && cmake .. && make