Fix for "Datasource XXXXXX Not Found" PowerBI Refresh issues

Hi community. There are a class of Refresh errors for PowerBI reports where the message in the logs shows 'Datasource xxxxx is not found'. There is a fix in the upcoming May release that should help a large number of customers hitting this error.

In the mean time, this can be fixed by editing the RSHostingService config to add Hosting-databaseValidationStatus to the AS configuration.

Steps:

1. Open RSHostingService config.json file. for example: "C:\Program Files\Microsoft Power BI Report Server\PBIRS\RSHostingService\config.json"

2. Find the section with name = "AS".
3. Under "restartOnChangesTo" key, add "Hosting-databaseValidationStatus" to the entries

For example-

before:

{
    "name": "AS",
    "launcher":"AnalysisServices",
    "path": "ASEngine\\msmdsrv.exe",
    "Config":
    {
      "Workspaces.path": "ASEngine\\workspaces",
      "restartOnChangesTo": "ASPort,Workspaces.path"
    }
}

after:

{
    "name": "AS",
    "launcher":"AnalysisServices",
    "path": "ASEngine\\msmdsrv.exe",
    "Config":
    {
      "Workspaces.path": "ASEngine\\workspaces",
      "restartOnChangesTo": "Hosting-databaseValidationStatus,ASPort,Workspaces.path"
    }
}