Modify POST /api/report/:id/evaluate endpoint to allow multiple filter values

{
    id: 'string',
    name: 'string',
    lastModifier: 'user_id',
    lastModified: '2017-11-05T04:11:17.121',
    owner: 'user_id',
    created: '2017-11-04T11:15:35.111',
    combined: false,
    reportType: 'process',
    currentUserRole: 'editor', // or viewer
    data: {
      processDefinitionKey: '...',
      processDefinitionVersions: ['...'], // a list of versions or ['all'] or ['latest']
      tenantIds: ["tenantId1", ...] // none, one or multiple tenantIds, to filter for instances with no tenant provide a `null` entry or an empty list
      filter: [
        {
 
  "type": "variable",
  "data": [
 
    {
      "type": "type1",
      "name": "variable name",
      "data": {
        "values": [
          filter value
        ]
      }
    },
 
    {
      "type": "type2",
      "name": "variable name",
      "data": {
        "values": [
          "filter value 1",
           "filter value 2"
        ]
      }
    }
  ],
  "filterLevel": "instance",
  "appliedTo": [
    "definition"
  ]
 
}
      ],
      view: {
        entity: 'processInstance', // 'flowNode'
        property: 'frequency'
      }
      groupBy: {
        type: 'startDate',  // 'flowNodes', 'variable', 'endDate'
        value: {
          unit: 'day'  // month, hour, day, year, week, automatic
        }
      },
      distributedBy: {
        type: 'none', // or userTask, FlowNode, Assignee, Candidate Group
        value: null
      },
      visualization: 'number',  // 'table', 'bar', 'line', 'pie', 'badge', 'heat',
    },
    result: {
      measures: [{
        property: 'duration',
        aggregationType: 'min',  // optional
        userTaskDurationTime: 'work'   // optional
        data: [
          {key: "2017-11-01T00:00:00", value: 23}, // can also contain optional 'label' property for e.g. groupBy: flowNodes reports
          {key: "2017-11-02T00:00:00", value: 7},
          {key: "2017-11-03T00:00:00", value: 11},
          ...
        ]
      }],
      isComplete: true // false if the result data is truncated due exceeding length limit
      instanceCount: 1234,
      instanceCountWithoutFilters: 1300,
      type: 'map'
    }
  }