--must import quaternion library before habitat_sim for audio compile

If not imported here and sim is compiled with audio support, python tests will abort due to the habitat_sim import causing an invalid free() error

tests/conftest.py

@@ -10,6 +10,10 @@
 
 import pytest
 
+# Need to import quaternion library here despite it not being used or else importing
+# habitat_sim below will cause an invalid free() when audio is enabled in sim compilation
+import quaternion  # noqa: F401
+
 import habitat_sim
 
 _test_scene = osp.abspath(