CAMEL-5938 fix the issue of MailConverters fails with uppercase content type TEXT/PLAIN
Merged revisions 1429707 via svnmerge from 
https://svn.apache.org/repos/asf/camel/trunk

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  r1429707 | ningjiang | 2013-01-07 16:45:56 +0800 (Mon, 07 Jan 2013) | 1 line
  
  CAMEL-5938 fix the issue of MailConverters fails with uppercase content type TEXT/PLAIN
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git-svn-id: https://svn.apache.org/repos/asf/camel/branches/camel-2.10.x@1429711 13f79535-47bb-0310-9956-ffa450edef68