Prettymongosnaphot

This patch changes the export of mongo snapshots from a online per document format to a pretty json format. With this a change in a document of mongodb does not require an update of the whole document but a small delta update is possible. Additionally, it is much easier to see what changed in an update since the lines are not thousands of charachters long.

old format: { "_id": { "$oid": "5501e76e0efe001bc1fdf999" }, "attrs": { "measure": [ { "value": { typeName": "::memoryx::OacStatisticalMeasureBase", "value": { "count": 0, "countFailed": } } } ] } }

new format:

{
    "_id": {
        "$oid": "5501e76e0efe001bc1fdf999"
    }, 
    "attrs": {
        "measure": [
            {
                "value": {
                    "typeName": "::memoryx::OacStatisticalMeasureBase", 
                    "value": {
                        "count": 0, 
                        "countFailed": 0
                    }
                }
            }
        ]
    } 
}