INT-3001 Field Order in SyslogToMapTransformer

Use a LinkedHashMap instead of HashMap so iterators
retain the original field order.
Merge pull request #798 from garyrussell/INT-3001

* garyrussell-INT-3001:
  INT-3001 Field Order in SyslogToMapTransformer
INT-2976 Update JavaMail to 1.4.7
Merge pull request #796 from garyrussell/INT-2976

* garyrussell-INT-2976:
  INT-2976 Update JavaMail to 1.4.7