Do not create GeometryFactory in GeometryUtils too often

[marecabo]

This change reuses a static GeometryFactory in GeometryUtils which might improve performance for repeated calls to createGeotoolsPoint and createGeotoolsLineString.

[Janekdererste]

We also have MGC which provides conversions between MATSim geotools abstractions such as Coord and Point. Possibly, this could be done there as well?

(Just a guess, I haven't checked myself)

[marecabo]

Fortunately, this is already done there:

matsim-libs/matsim/src/main/java/org/matsim/core/utils/geometry/geotools/MGC.java

Line 47 in ef7e434

public static final GeometryFactory geoFac = new GeometryFactory();