added authentication

fixed cred_type for authentication

app/controllers/mixins/ems_common_angular.rb

@@ -468,6 +468,7 @@ def set_ems_record_vars(ems, mode = nil)
           hawkular_endpoint.merge!(endpoint_security_options(hawkular_security_protocol, hawkular_tls_ca_certs))
         end
         if params[:alerts_selection] == 'prometheus'
+          params[:cred_type] = "prometheus_alerts"
           prometheus_alerts_endpoint = {:role => :prometheus_alerts, :hostname => prometheus_alerts_hostname, :port => prometheus_alerts_api_port}
           prometheus_alerts_endpoint.merge!(endpoint_security_options(prometheus_alerts_security_protocol, prometheus_alerts_tls_ca_certs))
         end
@@ -567,6 +568,9 @@ def build_credentials(ems, mode)
       if ems.kind_of?(ManageIQ::Providers::ContainerManager)
         default_key = params[:default_password] ? params[:default_password] : ems.authentication_key
         creds[:hawkular] = {:auth_key => default_key, :save => (mode != :validate)}
+        if params[:alerts_selection] == 'prometheus'
+          creds[:prometheus_alerts] = {:auth_key => default_key, :save => (mode != :validate)}
+        end
         creds[:bearer] = {:auth_key => default_key, :save => (mode != :validate)}
         creds.delete(:default)
       end