Post message in v8 terriajs format

[mwu2018]

Description

As a parent window, it will post the message to national map. The message is in v7 terriajs format. Once the national map is upgraded to v8 terriajs, the format must be changed to something similar to

{
  "catalog": [
    {
      "name": "Credit Licence Dataset - National Map",
      "type": "magda",
      "recordId": "dist-dga-548075a1-c36e-4837-bf26-cc00567b5c23",
      "url": "https://dev.magda.io/"
    }
  ],
  "baseMapName": "Positron (Light)"
}

Acceptance Criteria

When click on Open in national map, the item should be displayed in the national map.

Technical Notes

n/a

Out of Scope

n/a

[t83714]

@mwu2018 In order to support Magda internal storage files. I recently made some change to MagdaCatelogueItem.ts in magda-preview-map (See this PR) and it (not the button function but the preview map feature.) now sends the following to `magda-preview-map: See here

{
            initSources: [
                {
                    catalog: [
                        {
                            name: selectedDistribution.title,
                            type: "magda-item",
                            url: config.baseUrl,
                            storageApiUrl: config.storageApiUrl,
                            distributionId: selectedDistribution.identifier,
                            // --- default internal storage bucket name
                            defaultBucket: DATASETS_BUCKET,
                            isEnabled: true,
                            zoomOnEnable: true
                        }
                    ],
                    baseMapName: "Positron (Light)",
                    homeCamera: {
                        north: -8,
                        east: 158,
                        south: -45,
                        west: 109
                    },
                    corsDomains: [urijs(config.baseExternalUrl).hostname()]
                }
            ]
        }

We probably need to make sure terriaJs support those features. Otherwise, magda-preview-map repo still cannot be upgraded to the latest version TerriaMap (Otherwise, it will lose the internal storage support).

[mwu2018]

According to https://github.com/TerriaJS/terriajs/blob/magda-doc/doc/connecting-to-data/catalog-type-details/magda-distribution.md, the posted catalog format mush be like

    const catConfig = {
            initSources: [
                {
                    catalog: [
                        {
                            name: this.props.distribution.title,
                            type: "magda",
                            recordId: this.props.distribution.identifier,
                            url: config.baseExternalUrl
                        }
                    ],
                    workbench: ['//' + this.props.distribution.title]
                }
            ]
        };

[t83714]

And a better format to generate id:

{
initSources: [
                {
                    catalog: [
                        {
                            name: this.props.distribution.title,
                            type: "magda",
                            recordId: this.props.distribution.identifier,
                            url: config.baseExternalUrl,
                            id: "data.gov.au-postMessage-" + this.props.distribution.identifier
                        }
                    ],
                    workbench: ["data.gov.au-postMessage-" + this.props.distribution.identifier]
                }
            ]
}