fix /metrics matching

Author: finkr

vmware_exporter/vmware_exporter.py

@@ -893,9 +893,9 @@ def generate_latest_metrics(self, request):
             self.config[section]['ignore_ssl'],
         )
         metrics = yield collector.collect()
-		
+
         # URI /metrics?section=default
-        if request.path = '/metrics' and section == 'default':
+        if request.path == b'/metrics' and section == 'default':
             registry = REGISTRY
         else:
             registry = CollectorRegistry()