Skip AWT integration test on macOS

It hangs, due to macOS's threading strictness.

Author: ctrueden

tests/it/awt.py

@@ -2,10 +2,15 @@
 Test scyjava AWT-related functions.
 """
 
+import platform
 import sys
 
 import scyjava
 
+if platform.system() == "Darwin":
+    # NB: This test would hang on macOS, due to AWT threading issues.
+    sys.exit(0)
+
 assert not scyjava.jvm_started()
 scyjava.start_jvm()