test data for parallel_merge_otus
added random.choice, passing queues, removed some comments
passing queue
test data with unique internal nodes
internal nodes are now unique
addressing Jai's comments
cleaned up cmd in script usage
Merge pull request #1064 from wasade/issue1058

Issue1058
unique and simple internal merge nodes
Merge pull request #1067 from wasade/simple_int_merge_nodes

unique and simple internal merge nodes