Port travis_retry for CI (#7379)

* Port travis_retry for CI

* Add license

spec/spec_helper.rb

@@ -1,4 +1,3 @@
-#require 'rspec/retry'
 require 'simplecov'
 
 GC.disable
@@ -12,9 +11,6 @@ end
 gc_counter = -1
 
 RSpec.configure do |config|
-  #config.verbose_retry = true
-  #config.display_try_failure_messages = true
-
   config.expect_with :rspec do |expectations|
     expectations.include_chain_clauses_in_custom_matcher_descriptions = true
   end
@@ -29,10 +25,6 @@ RSpec.configure do |config|
     end
   end
 
-  #config.around :each do |ex|
-  #  ex.run_with_retry retry: 3
-  #end
-
   config.before :suite do
     Chewy.strategy(:bypass)
   end