create Path to /neighbors before trying to open file

[tcnichol]

This fixes an error in the maple_divideimage_234_new.py that is called by maple workflow.

The script tries to open a file that is in a directory that does not yet exist. I added a step to create that directory first.

[amalshehan]

@tcnichol did you run the mpl_workflow_create_dir_struct.py prior to the running the workflow. In the codebase some of the directories are created and some are not so by running create directories you can avoid these issues. But we can incorporate this fix once you confirm about running the create directory code.

[gugibugy]

+1 to @amalshehan comment above. I made sure to run the directory set up script before executing the pipeline and I didn't encounter any issues with the neighbor directory!

[tcnichol]

Let me try to run that first and then see if it still happens. I realize that when I ran the workflow with the Dockerfile it didn't have that step.