fix: Start with an empty dict when package collection is enabled

Signed-off-by: Ferenc Géczi <[email protected]>

Author: Ferenc-

instana/collector/helpers/runtime.py

@@ -204,6 +204,7 @@ def gather_python_packages(self):
         if os.environ.get('INSTANA_DISABLE_PYTHON_PACKAGE_COLLECTION'):
             return {'instana': VERSION}
 
+        versions = {}
         try:
             sys_packages = sys.modules.copy()