Changed default aircraft in config to upper case CSMR

aerodynamic_analysis/aerodynamic_analysis_conf.xml

constraint_analysis/constraint_analysis_conf.xml

cost_estimation/cost_estimation_conf.xml

create_mission_xml/create_mission_xml_conf.xml

ecological_assessment/ecological_assessment_conf.xml

empennage_design/empennage_design_conf.xml

fuselage_design/fuselage_design_conf.xml

initial_sizing/initial_sizing_conf.xml

landing_gear_design/landing_gear_design_conf.xml

mission_analysis/mission_analysis_conf.xml

performance_assessment/performance_assessment_conf.xml

propulsion_design/propulsion_design_conf.xml

...and_balance_analysis/weight_and_balance_analysis_conf.xml

wing_design/wing_design_conf.xml