fix auto-instrument loading tests for trace exporter. (#197)

* fix auto-instrument loading tests for trace exporter.

* Update gce build to have a higher health check timeout

See #197 (comment)

Co-authored-by: Aaron Abbott <[email protected]>

Author: muncus

cloudbuild-e2e-gce.yaml

@@ -30,6 +30,7 @@ steps:
     args:
       - gce
       - --image=$_TEST_SERVER_IMAGE
+      - --health-check-timeout=5m
 
 logsBucket: gs://opentelemetry-ops-e2e-cloud-build-logs
 substitutions:

opentelemetry-exporter-gcp-trace/tests/test_cloud_trace_auto_instrument.py

@@ -24,8 +24,10 @@ class TestCloudTraceAutoInstrument(TestCase):
     def test_loads_cloud_trace_exporter(self):
         """Test that OTel configuration internals can load the trace exporter from entrypoint
         by name"""
-        trace_exporters, _ = _import_exporters(
-            trace_exporter_names=["gcp_trace"], log_exporter_names=[]
+        trace_exporters, _, _ = _import_exporters(
+            trace_exporter_names=["gcp_trace"],
+            log_exporter_names=[],
+            metric_exporter_names=[],
         )
         self.assertEqual(
             trace_exporters, {"gcp_trace": CloudTraceSpanExporter}