Fix bucket permission validation upload options

Pass 'upload_options' hash through to the bucket upload_test_file method to
fix issues where permission errors were happening when trying to validate
permissions on buckets with an 'encryption required' policy.

Fixes logstash-plugins#188, logstash-plugins#146, logstash-plugins#132

Fixes logstash-plugins#191

lib/logstash/outputs/s3/write_bucket_permission_validator.rb

@@ -15,7 +15,7 @@ def initialize(logger)
 
         def valid?(bucket_resource, upload_options = {})
           begin
-            upload_test_file(bucket_resource)
+            upload_test_file(bucket_resource, upload_options)
             true
           rescue StandardError => e
             logger.error("Error validating bucket write permissions!",

spec/outputs/s3/write_bucket_permission_validator_spec.rb

@@ -17,6 +17,16 @@
     expect(bucket).to receive(:object).with(any_args).and_return(obj)
   end
 
+  context 'when using upload_options' do
+    let(:upload_options) {{ :server_side_encryption => true }}
+    it 'they are passed through to upload_file' do
+      expect(obj).to receive(:upload_file).with(anything, upload_options)
+      expect(obj).to receive(:delete).and_return(true)
+      expect(subject.valid?(bucket, upload_options)).to be_truthy
+    end
+
+  end
+
   context "when permissions are sufficient" do
     it "returns true" do
       expect(obj).to receive(:upload_file).with(any_args).and_return(true)