Fix ver2 MRI-JRA55-do-1-5-0

[HiroyukiTsujino]

Many thanks @durack1 for the updated tables (#111). My demos worked with CMOR3.6.0 as I intended after several edits. Is it possible to incorporate the following modifications?

• In mriJRA55-do-input.json, "source_id" should be "MRI-JRA55-do-1-X-0" to be consistent with intput4MIPs_CV.json. (2nd commit).
• Variables in JRA55-do use several kinds of distinct grids, so I think that it is not appropriate to give unique "grid", "grid_label", "nominal_resolution" to the entire dataset. Instead, I am giving "grid", "grid_label", and "nominal_resolution" to each variable in python scripts to generate CMORized files (e.g., demo/MRI-JMA-JRA55-do-1-5-0/runCmorAllWrite-1-5-0.py). Note that overwriting global_attributes with runCmorAllWrite-1-5-0.py was not possible for those defined by "input4MIPs_CV.json". So, in the 1st commit, I edited input4MIPs_source_id.json so that "grid", "grid_label", "nominal_resolution" entries are eventually dropped from intpu4MIPs_CV.json (perhaps by your processing). If this is acceptable, I would like to take this method.
• In the 3rd commit, demo/MRI-JMA-JRA55-do-1-4-0/Tables/input4MIPs_CV.json has been corrected by hand. (i.e., "grid", "grid_label", "nominal_resolution" entries for *1-5-0 are dropped.)
• In the 4th commit, I added demos that generate CMORized files for JRA55-do-v1.5.0, they indeed worked with CMOR 3.6.0. Note that contents of demo/MRI-JMA-JRA55-do-1-5-0/Tables are copied from demo/MRI-JMA-JRA55-do-1-4-0/Tables, including corrected input4MIPs_CV.json at the above (the 3rd) commit.

[durack1]

@HiroyukiTsujino I am closing this, as I hope all changes are now included in the #114