remove LiveMetric hardcoded column includes

reports put virtual columns in includes
this is used by Hawkluar LiveMetrics to send the column list to the
server.

Changed LiveMetric virtual column detection to auto include these
columns without hardcoding the class name

app/models/live_metric.rb

@@ -3,6 +3,13 @@ class LiveMetric < ActsAsArModel
 
   class LiveMetricError < RuntimeError; end
 
+  # all attributes are virtual
+  # - attributes are dynamically generated and would be too much work to query/declare them all
+  # - returning true gets the column names into the REST query (via :includes)
+  def self.virtual_attribute?(_c)
+    true
+  end
+
   def self.find(*args)
     raw_query = args[1]
     validate_raw_query(raw_query)

app/models/miq_report/generator.rb

@@ -84,7 +84,7 @@ def get_include_for_find(includes, klass = nil)
     if klass.nil?
       klass = db_class
       result = {}
-      cols.each { |c| result.merge!(c.to_sym => {}) if klass.virtual_attribute?(c) || klass == LiveMetric } if cols
+      cols.each { |c| result.merge!(c.to_sym => {}) if klass.virtual_attribute?(c) } if cols
     end
 
     if includes.kind_of?(Hash)