PIG-3505: Make AvroStorage sync interval take default from io.file.buffer.size (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1541218 13f79535-47bb-0310-9956-ffa450edef68
Revert PIG-3507: It fails to run pig in local mode on a Kerberos enabled Hadoop cluster as it breaks compatibility with hadoop 0.20

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1541219 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk