reduce unwanted randomness

[kainagel]

I had repaired the tests in RunFabilandTest so that they deterministically passed on my local machine. However, on the build server they failed. Inspection of the output revealed that, in the matsim plans that came from silo and entered in the year one matsim simulation, some of the persons had other home location coordinates. Presumably, the Moves model was not deterministic in the sense that it produced different results on different machines. I did the following:

1. change all HashMap to LinkedHashMap to make iterations over the containers independent from hardware. This did not fix my issue, but I think that it is in general useful.
2. remove the multi-threading in MovesModelImpl. THIS ACTUALLY FIXED THE PROBLEM, i.e. the Moves model now returns the same result on the build server as on my local machine. The multi-threading in that method was not dependent on some separate config parameter, but was programmed as a side-effect of TransportModelPropertiesModule.TravelTimeImplIdentifier.MATSIM. I thus switched off the multi-threading completely in that class; if someone wants to be able to switch it on by a separate parameter, please go ahead and add the corresponding code.
3. I am also trying to reduce non-final static variables, since they are known to cause such problems. Either make them non-static (i.e. instance variables) if possible, or try to make them final.