fix tests

Author: sumerc-psh

blackfire_conprof/profiler.py

@@ -80,7 +80,7 @@ def __init__(self, application_name=None, agent_socket=None,
         # provide a way to set them
         os.environ["DD_PROFILING_UPLOAD_INTERVAL"] = str(period)
         os.environ["DD_PROFILING_API_TIMEOUT"] = str(upload_timeout)
-        os.environ["DD_INSTRUMENTATION_TELEMETRY_ENABLED"] = False
+        os.environ["DD_INSTRUMENTATION_TELEMETRY_ENABLED"] = "False"
 
         api_key = ''
         if server_id and server_token: