Pagination links do not truncate existing pagination parameters

[glungley]

https://github.com/thomaxxl/safrs/blame/master/safrs/jsonapi_formatting.py#L128

Once the pagination values have been set on the URL, they are included in first, last etc. links in the output json.

e.g.

    'links': {
        'first': 'http://#.#/api/table/?filter[table_id]=18&page[offset]=250&page[limit]=250&page[offset]=0&page[limit]=250',
        'last': 'http://#.#/api/table/?filter[table_id]=18&page[offset]=250&page[limit]=250&page[offset]=11000&page[limit]=250',
        'next': 'http://#.#/api/table/?filter[table_id]=18&page[offset]=250&page[limit]=250&page[offset]=500&page[limit]=250',
        'self': 'http://#.#/api/table/?filter[table_id]=18&page[offset]=250&page[limit]=250&page[offset]=250&page[limit]=250'
    },

[thomaxxl]

Thanks!