Flask: POST analysis-dataset metadata to phenotips

[delvinso]

part of #1021

TODO - mostly contingent on the endpoint existing and being testable

• confirm JSON shape
• add logic for fetching PT's internal ID:
  • i) integrate directly into the click command or,
  • ii) create a wrapper script that invokes this click command
• flesh out details for handling PT credentials, POSTing the payload and handling exceptions, will depend on how logic for fetching internal ID is integrated

Sample JSON:

{
    "dataset_type": "RES",
    "tissue_sample_type": "Unknown",
    "files": "/hpf/largeprojects/ccm_dccforge/dccforge/results/10x/1002",
    "analysis_date": "2020-04-07"
}