scale pman

[husky-parul]

@danmcp @ravisantoshgudimetla Scaling pman by removing pman intrenal ptree. The command to check status for a job doesn't not uses p-tree, instead queries OpenShift API.

These are commands that do not use ptree any more: run status

Additional changes to do:

• modify pman to execute other commands like get, info, quit,search that w/o ptree
• cleaning job pods after job is done

[danmcp]

@husky-parul Have you looked into the travis failure?

[danmcp]

@husky-parul Can you update the title and commit message with a more accurate description.

[husky-parul]

@danmcp @ravisantoshgudimetla Added logic for returning status for jobs that were never triggered or deleted from OpenShift