adjust import of ariane's GPR TAS server

tas/ariane.py

@@ -4,7 +4,7 @@ from lib.general.benchmarking import CostMeasure
 from lib.tas.benchmarking import AngleMapInducedMetric, TASAutonomousApproach, \
     TASTestCase
 
-from ariane.app.tas import run_server
+from ariane.app.tas.server_gpr import run as run_server
 from ariane.app.tas.client_stub import ClientStubTAS
 
 from threading import Thread