Change: submission dates are now managed as long on the users' side

src/users/user.hpp

@@ -47,7 +47,7 @@ public:
 
 protected:
     long date_of_next_submission;
-    double end_submit;
+    long end_submit;
     // TODO retrieve that info from the platform (wait batsim5.0)
     double platform_computing_speed = PLATFORM_COMPUTING_SPEED;
 };