New public study: Plexiforme Neurofibroma Serra NFOSI

[anngvu]

What?

Fix #1973 .

Cancer studies updated in this pull request:

• none (new study)

checks

For all pull requests:

• Passes validation
  Note: This adds a new cancer type.

For a new study (in addition to above):

• Does study name and study ID follow our convention? e.g. Tumor_Type (Institue, Journal Year); brca_mskcc_2015
• is study meta data complete? e.g. pmid, group of PUBLIC
• were all samples profiled with WES/WGS? If not, is gene panel file curated?
• are oncotree codes of all samples curated; Cancer Type and Cancer Type Detailed needs to be added in addition to Oncotree Code
• clinical sample and patient data with meta files
• Expression data including z-scores with meta files
• Case-lists for all profiles.
• Manual checking (Niki or JJ): Triage or private Portal link here

[anngvu]

@ritikakundra This is a small and easy dataset. Hopefully I can ask a favor to have you take a look, though it looks like you guys are super busy.