Adding tempest prefix option in tempest.conf

Adding a new config option in tempest.conf as the prefix for the random
name resources with this new option all the resources created by
tempest will have the prefix defined by resource_name_prefix option
in tempest.conf. If not defined the default is tempest.

Tempest cleanup CLI will then use this config option to cleanup only the
resources that match the prefix. Make sure this prefix does not match with
the resource name you do not want Tempest cleanup CLI to delete.

This is a patch created after the conversation on
https://review.opendev.org/c/openstack/tempest/+/879923?tab=comments

Related-Bug: #1945082
Change-Id: I663a6307a5aa63299d20a304188efe6d29aea9d3
diff --git a/releasenotes/notes/Add-resource_name_prefix-config-option-26e0b7cfeffc48f9.yaml b/releasenotes/notes/Add-resource_name_prefix-config-option-26e0b7cfeffc48f9.yaml
new file mode 100644
index 0000000..0824c66
--- /dev/null
+++ b/releasenotes/notes/Add-resource_name_prefix-config-option-26e0b7cfeffc48f9.yaml
@@ -0,0 +1,10 @@
+---
+features:
+  - |
+    A new config option in the default section, resource_name_prefix,
+    is added to allow users to customize the name (specifically the prefix)
+    of the resources created by Tempest during a test run. By default it is
+    set to tempest.
+    Tempest cleanup CLI will then use this config option to cleanup only the
+    resources that match the prefix. Make sure this prefix does not match with
+    the resource name you do not want Tempest cleanup CLI to delete.