Add amphorav2 to provider list

Change-Id: I10112d871a5628c99c3f2374c8451d936ab9bedb
Story: 2005072
diff --git a/octavia_tempest_plugin/common/constants.py b/octavia_tempest_plugin/common/constants.py
index a60800f..44bf3e5 100644
--- a/octavia_tempest_plugin/common/constants.py
+++ b/octavia_tempest_plugin/common/constants.py
@@ -196,6 +196,9 @@
     STATUS_PENDING_DELETE, STATUS_DELETED, STATUS_ERROR
 )
 
+# Amphora providers list
+AMPHORA_PROVIDERS = ['amphora', 'amphorav2', 'octavia']
+
 # Flavor capabilities
 LOADBALANCER_TOPOLOGY = 'loadbalancer_topology'