Use proper Warning class so it raises normally.

Author: dihm

runmanager/__init__.py

@@ -923,8 +923,8 @@ def get_shot_globals(filepath):
     """
 
     warnings.warn(
-        DeprecationWarning("This function has moved to labscript_utils.shot_utils. "
-                           "Please update your code to import it from there."))
+        FutureWarning("get_shot_globals has moved to labscript_utils.shot_utils. "
+                      "Please update your code to import it from there."))
 
     return labscript_utils.shot_utils.get_shot_globals(filepath)