CL: multiple synth locks for single lock

[czarcas7ic]

Background

The migration logic for CL requires the underlying lock to have a single synthetic lock. By skimming the code, it looks like it is possible for a lock to have multiple synthetic locks.

Suggested Design

If the above is true, we need to either:

• refactor migration logic to accept a lock with multiple underlying synthetic locks
  or
• if we accept that fact that people with multiple underlying synthetic locks for a single lock will not be able to migrate, we need to determine how many people this will effect. If its a lot, then we should go back to drawing board to determine best course of action.

Acceptance Criteria

One of the above paths is taken and tests are added relevant to that path.