fix: pass on_failure_retry hook if retry is not defined

https://jira.railsc.ru/browse/BPC-11091

lib/resque/integration/unique.rb

@@ -120,6 +120,8 @@ def before_dequeue_lock(*args)
       end
 
       def on_failure_retry(exception, *args)
+        return unless defined?(super)
+
         # Keep meta_id if kill -9 (or ABRT)
         @meta_id = args.first if exception.is_a?(::Resque::DirtyExit)
 

spec/resque/integration/unique_spec.rb

@@ -153,13 +153,12 @@ class JobOnlyUnique
     unique
 
     def self.execute
-      raise 'Some exception in Job'
+      raise ArgumentError.new('Some exception in Job')
     end
   end
 
   let(:worker) { Resque::Worker.new(:default) }
 
-
   context 'when unique with retry' do
     let(:job) { Resque::Job.new(:default, 'class' => 'JobUniqueWithRetry', 'args' => ['abcd', 1, {foo: 'bar'}]) }
 
@@ -177,7 +176,8 @@ def self.execute
     let(:job) { Resque::Job.new(:default, 'class' => 'JobOnlyUnique', 'args' => ['abcd']) }
 
     it do
-      expect { job.perform }.to raise_error(RuntimeError, /no superclass method `on_failure_retry'/)
+      expect { job.perform }.not_to raise_error(RuntimeError, /no superclass method `on_failure_retry'/)
+      expect { job.perform }.to raise_error(ArgumentError)
     end
   end
 end