Exclude generators from codecov calculation

Easier than trying to force it

Author: crmne

spec/support/simplecov_configuration.rb

@@ -5,6 +5,7 @@
     add_filter '/spec/'
     add_filter '/vendor/'
     add_filter 'acts_as_legacy.rb'
+    add_filter '/lib/generators/'
 
     enable_coverage :branch