This also renames the existing FlowRegistry to FlowPicker to avoid
overloaded uses of the word "registry". Absent this renaming, the new
package would've been google.registry.flows.registry, which gives
entirely the wrong impression as it makes it sound like the home for
flows that affect TLDs.
This is a preparatory CL for adding flow picker engines that will
allow customized flows to run on a per-TLD basis.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=122671260
ReferenceUnion is a hack to work around the mismatch between how
we store references (by roid) and how they are represented in EPP
(by foreign key). If it ever needed to exist (not entirely clear...)
it should have remained tightly scoped within the domain commands
and resources. Instead it has leaked everywhere in the project,
causing lots of boilerplate. This CL hides all of that behind
standard Refs, and should be followed by work to remove ReferenceUnion
completely.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=122424416
The dark lord Gosling designed the Java package naming system so that
ownership flows from the DNS system. Since we own the domain name
registry.google, it seems only appropriate that we should use
google.registry as our package name.
This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.
