Python module test: Don't cfail the test when import failure happens in preset

tests/python/bl_load_py_modules.py

@@ -178,6 +178,7 @@ def load_modules():
                     for f in MODULE_SYS_PATHS.get(mod_name_full, ())
                     ])
 
+                try:
                     __import__(mod_name_full)
                     mod_imp = sys.modules[mod_name_full]
 
@@ -187,6 +188,18 @@ def load_modules():
                     assert(os.path.samefile(mod_imp.__file__, submod_full))
 
                     modules.append(mod_imp)
+                except Exception as e:
+                    import traceback
+                    # Module might fail to import, but we don't want whole test to fail here.
+                    # Reasoning:
+                    # - This module might be in ignored list (for example, preset or template),
+                    #   so failing here will cause false-positive test failure.
+                    # - If this is module which should not be ignored, it is not added to list
+                    #   of successfully loaded modules, meaning the test will catch this
+                    #   import failure.
+                    # - We want to catch all failures of this script instead of stopping on
+                    #   a first big failure.
+                    traceback.print_exc()
 
     #
     # check which filepaths we didn't load