Identify usage instances of legacy project_status endpoint format and upgrade them

[lukbut]

A newer project_status endpoint format section was introduced in #225 which contains the status and associated last modified date and samples. The new format section is defined below:

...
"status": {
            "<status_name>": {  "samples": [<list of sample names>],
                                              "last_modified_date": <date>
                                            }
            ...
}
...

All existing uses of the previous format, defined below, need to be changed to use the newer format section. The legacy API endpoint format can then be retired.

... "<status_name>": [<list of sample names>] ...