Feat global partition

In order to solve uabrc/CRI_XCBC#86, this PR makes partitions to be a globally defined variable. This makes it easier to modify the partition list in the future.

This should be merged alone with all ood apps PRs:

• ANSYS: https://github.com/uabrc/ood_ansys/pull/5
• IGV: https://github.com/uabrc/ood_igv/pull/3
• Matlab: https://github.com/uabrc/bc_osc_matlab/pull/4
• SAS: https://github.com/uabrc/ood_sas/pull/7
• Jupyter: https://github.com/uabrc/bc_example_jupyter/pull/4
• JupyterLab: https://github.com/uabrc/ood_jupyterlab/pull/2
• RStudio: https://github.com/uabrc/bc_rcc_rstudio_server/pull/3

Reference: ood-doc