updated server registration test

tests/test.yml

diff --git a/tests/test.yml b/tests/test.yml
index 3d29be4..31feec2 100644
--- a/tests/test.yml
+++ b/tests/test.yml
@@ -3,4 +3,4 @@
 - hosts: pgstandby
   gather_facts: no
   roles:
-    - { role: apigee-opdk-server-registration-state, username: "{{ opdk_user_email }}", password: "{{ opdk_user_pass }}", server_self: "{{ edge_ps_self }}", mgmt_server_ip: "{{ local_mgmt_ip }}" }
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+    - { role: apigee-opdk-server-registration-state, username: "{{ opdk_user_email }}", password: "{{ opdk_user_pass }}", server_type: "{{ edge_ps_self }}", mgmt_server_ip: "{{ local_mgmt_ip }}" }
\ No newline at end of file