Implemented changes to correct faulty imports due to old template

• usermethoddatapreparation.py: Corrected some acXML paths to read from
• _02_calculatecrewcosts.py: Hard-coded number of cockpit crew members since information not given atm (set to 2)
• methodkerosene.py: First merge acXML and module config file dicts, than check for missing values

cost_estimation/src/tube_and_wing/empirical/operating_cost_estimation_tu_berlin/general/call_functions/_00_determinerouteandclassdependentparameter.py

 def determine_route_and_class_dependent_parameter(dict_ac_data, dict_operating_costs, runtime_output):
     """Determine parameter that depend on the route length and seating classes.
 
-    An absolute cost statement is not very meaningful. Only the reference to the revenue potential provides a good basis
-    for comparison. The transport work in the form of annual utilization is a significant factor. The calculation of the
-    DOC is often not based on the respective design range, but on standard route lengths typical for the operation.
+    An absolute cost statement is not very meaningful. Only the reference to the revenue potential provides a good
+    basis for comparison. The transport work in the form of annual utilization is a significant factor. The
+    calculation of the DOC is often not based on the respective design range, but on standard route lengths typical
+    for the operation.
     For Europe, the standard ranges are
         - regional (0 to 500 km),
         - short range (500 to 1000 km),
         - medium range (1000 km to 4000 km),
         - long range (4000 to 6500 km), and
         - ultra long range (more than 6500 km).
-    Both, the number of crew members and their salaries and the number of crews depend on these ranges. Since the annual
-    flight hours of an aircraft are far greater than the available dispatch time of a crew, a corresponding number of
-    crews must be provided for each aircraft. It is generally assumed that longer routes entail more crew members and
-    crews.
+    Both, the number of crew members and their salaries and the number of crews depend on these ranges. Since the
+    annual flight hours of an aircraft are far greater than the available dispatch time of a crew, a corresponding
+    number of crews must be provided for each aircraft. It is generally assumed that longer routes entail more crew
+    members and crews.
     Since the experienced (higher paid) flight attendants/pilots generally transfer to long-haul operations after a
     period of short-haul service, crew costs on long-haul routes are on average higher than on continental/short-haul
     routes. Cost differences between the operational areas are even more pronounced for flight crews than for cabin
@@ -31,7 +32,7 @@ def determine_route_and_class_dependent_parameter(dict_ac_data, dict_operating_c
         - float salary_cockpit_crew_member: Salary of one cockpit crew member in EUR
         - float revenue_per_seat_and_flight: Revenue per seat and flight in EUR
 
-    :param dict dict_ac_data: Dict containing parameters and values from aircraft exchange and module configuration file
+    :param dict dict_ac_data: Dict containing parameters and values from aircraft exchange and module config file
     :param dict dict_operating_costs: Dict containing parameters from cost estimation calculation
     :param logging.Logger runtime_output: Logging object used for capturing log messages in the module
     :return dict dict_operating_costs: Dict containing parameters from cost estimation calculation