Update the client TLS certificate for Prometheus

This change removes the 'alternative_names' parameter since it is useless
for clients. It also means that the class can be included without
depending on external _param variables.

Change-Id: I5d1a3570108afe3f940ee4acc77eb23758d248e4
diff --git a/salt/minion/cert/prometheus_server.yml b/salt/minion/cert/prometheus_server.yml
index 30a0711..154009b 100644
--- a/salt/minion/cert/prometheus_server.yml
+++ b/salt/minion/cert/prometheus_server.yml
@@ -9,5 +9,4 @@
           cert_file: ${prometheus:server:dir:config}/prometheus-server.crt
           common_name: prometheus-server
           signing_policy: cert_client
-          alternative_names: IP:${_param:cluster_vip_address},IP:${_param:cluster_node01_address},IP:${_param:cluster_node02_address},IP:${_param:cluster_node03_address},IP:${_param:kubernetes_internal_api_address}
           mode: '0444'