How to configure Lock timeout

Hi,

The base class of the Lock constructor suggests the timeout is configurable:

@timeout = options[:timeout] || 60 * 3

However, in the locking module, there is no way to put in the options with code like this. How do we easily change the configuration without changing the source code?

 def build_master_lock
    if supports_lua?
      Resque::Scheduler::Lock::Resilient.new(master_lock_key)
    else
      Resque::Scheduler::Lock::Basic.new(master_lock_key)
    end
  end

Start at the build_master_lock entry point shown in the issue and read the Lock, Resilient, and Basic constructors to trace how timeout options are handled. Determine how the locking module could expose that configuration without source edits, then add coverage for the configured timeout if an existing lock test location is found. Done means users can change the timeout through the supported configuration path.