Add missing second argument to to_bson methods, introduced with under…

…lying Mongo driver update (fixes issues logstash-plugins#60, logstash-plugins#64, logstash-plugins#65)

lib/logstash/outputs/bson/big_decimal.rb

@@ -33,7 +33,7 @@ module BigDecimal
     #   1.221311.to_bson
     # @return [ String ] The encoded string.
     # @see http://bsonspec.org/#/specification
-    def to_bson(buffer = ByteBuffer.new)
+    def to_bson(buffer = ByteBuffer.new, validating_keys = Config.validating_keys?)
       buffer.put_bytes([ self ].pack(PACK))	
     end
 

lib/logstash/outputs/bson/logstash_event.rb

@@ -30,7 +30,7 @@ module LogStashEvent
     #   Event.new("field" => "value").to_bson
     # @return [ String ] The encoded string.
     # @see http://bsonspec.org/#/specification
-     def to_bson(buffer = ByteBuffer.new)
+     def to_bson(buffer = ByteBuffer.new, validating_keys = Config.validating_keys?)
       position = buffer.length
       buffer.put_int32(0)
       to_hash.each do |field, value|

lib/logstash/outputs/bson/logstash_timestamp.rb

@@ -25,7 +25,7 @@ module LogStashTimestamp
     # A time is type 0x09 in the BSON spec.
     BSON_TYPE = 9.chr.force_encoding(BINARY).freeze
 
-    def to_bson(buffer = ByteBuffer.new)
+    def to_bson(buffer = ByteBuffer.new, validating_keys = Config.validating_keys?)
       time.to_bson(buffer)
     end