Workflow osm parameters

[ebocher]

As discussed with @simogeo and @j3r3m1 this PR introduces some changes in the input parameters.

• osm and bdtopo_v2 identifiers have been remove
• timeout and maxsize properties can be set to overpass query

Example

"input" : [
                        "locations" : ["Pont-de-Veyle"],
                        "timeout" : 900,
                        "maxsize":1073741824
]

default timeout and maxsize are aligned with Overpass API (180 s and 512 Mb)