Allow the top_boundary_integer to be passed in as a parameter.
Allow the top_boundary_integer to be passed in as a parameter.

Create a backwards compatible function for lock_head(tame)
clemensg/queue_classic,QueueClassic/queue_classic,mashroomxl/queue_classic,QueueClassic/queue_classic,bdon/queue_classic_java,YodelTalk/queue_classic