fixed error on config reload (#235)

Author: hvaghani221

lib/fluent/plugin/out_splunk.rb

@@ -92,6 +92,10 @@ def configure(conf)
       end
     end
 
+    def shutdown
+      super
+    end
+
     def write(chunk)
       log.trace { "#{self.class}: Received new chunk, size=#{chunk.read.bytesize}" }
 

lib/fluent/plugin/out_splunk_hec.rb

@@ -169,8 +169,8 @@ def start
     end
 
     def shutdown
+      @conn.shutdown if not @conn.nil?
       super
-      @conn.shutdown
     end
 
     def format(tag, time, record)