This PR adds ability to set the selected TTL of the bfx auth token

The flow:

• on sign-up authTokenTTLSec param can be passed to specify the auth token TTL to override the default value 24h, available values between 24h and 7 days
  • signUp request

  {
    "method": "signUp",
    "auth": {
      "authToken": "pub:api:12345678-1234-4321-5678-12ab3ba45ab6-caps:s:o:f:w:wd:a-write",
      "isNotProtected": true
    },
    "params": {
      "authTokenTTLSec": 604800
    }
  }

  • if the value is out of the allowed range an error would be thrown, signUp response:

  {
    "jsonrpc": "2.0",
    "error": {
      "code": 400,
      "message": "Auth token TTL has been set to disallowed value",
      "data": null
    },
    "id": null
  }

• the next time, the auth token TTL can be fetched with signIn call, response example:

  {
    "jsonrpc": "2.0",
    "result": {
      "email": "user@email.com",
      "isSubAccount": false,
      "token": "12345678-1234-4321-5678-a1b234567890",
      "shouldNotSyncOnStartupAfterUpdate": false,
      "authTokenTTLSec": 604800
    },
    "id": null
  }

• to modify the auth token TTL may be used the updateUser endpoint
  • updateUser request

  {
      "auth": {
        "token": "12345678-1234-4321-5678-a1b234567890"
      },
      "method": "updateUser",
      "params": {
        "authTokenTTLSec": 601200
      }
  }

  • updateUser response

  {
    "jsonrpc": "2.0",
    "result": true,
    "id": null
  }

• if the value is out of the allowed range an error would be thrown:

  {
    "jsonrpc": "2.0",
    "error": {
      "code": 400,
      "message": "Auth token TTL has been set to disallowed value",
      "data": null
    },
    "id": null
  }

Basic changes:

• adds ability to override the default value 24h of the bfx auth token ttl
• adds ability to set authTokenTTLSec on sign-up
• adds ability to return authTokenTTLSec when sign-in
• adds ability to modify authTokenTTLSec field by updateUser method
• adds v34 DB migration
• adds corresponding test coverage
• fixes getWeightedAveragesReport test case