Remove non-existent config options of oslo modules
oslo.serialization and oslo.utils don't have any config options at all,
and `tempest init` command did output warning message when generating
tempest.conf. So this patch removes these entries from config-generator.
Closes-Bug: #1620861
Change-Id: Icad81bca5e3e3b69dee99fdac71174c149fd6df2
diff --git a/tempest/cmd/config-generator.tempest.conf b/tempest/cmd/config-generator.tempest.conf
index 49ad62d..b8f16d9 100644
--- a/tempest/cmd/config-generator.tempest.conf
+++ b/tempest/cmd/config-generator.tempest.conf
@@ -3,5 +3,3 @@
namespace = tempest.config
namespace = oslo.concurrency
namespace = oslo.log
-namespace = oslo.serialization
-namespace = oslo.utils