Fix error for mongo BSON document limit

*Added FiFo-Array as dependency to handle to many requests on a single bin
*Added propertie file to define max size of requests per bin
*Set default max size of requests per bin to 100

(at about 10.000 requests per bin parse error triggered when requesting bins)
There is no need for an external library, you can archive the same effect with the following lines of code:

    if (bin.requests.length >= properties.maxSizeRequests) { bin.requests.shift() }

This will remove the first entry in the array. Afterwards you can leave the implementation as it was. This solution is better as you won't create unecessary variables and kill references (by replacing bin.requests with the FifoArray instance)