After naively moving the classes, there were almost no incoming
references from the rest of the server packages into the new
server.receive package. This means with only a little more work, it was
possible to create a new java_library target containing just the srcs
in this new package. This is a modest step in the direction of breaking
up the giant //gerrit-server:server package, which will improve compile
times when making modifications that don't change the interface.
Change-Id: I449018a4933a999c688611142dc7ed9c18b4c828
798b883b40