refactor(conftest): Move instana import as much to the front as possible

Signed-off-by: Ferenc Géczi <ferenc.geczi@ibm.com>

tests/conftest.py

@@ -5,6 +5,13 @@
 import sys
 import pytest
 
+# Set our testing flags
+os.environ["INSTANA_TEST"] = "true"
+# os.environ["INSTANA_DEBUG"] = "true"
+
+# Make sure the instana package is fully loaded
+import instana
+
 collect_ignore_glob = []
 
 # Cassandra and gevent tests are run in dedicated jobs on CircleCI and will
@@ -36,14 +43,6 @@
     # The asyncio also depends on aiohttp
     collect_ignore_glob.append("*test_asyncio*")
 
-# Set our testing flags
-os.environ["INSTANA_TEST"] = "true"
-# os.environ["INSTANA_DEBUG"] = "true"
-
-# Make sure the instana package is fully loaded
-import instana
-
-
 @pytest.fixture(scope='session')
 def celery_config():
     return {