Mhansmire revert to hadoop 1.0.3

Change the SequenceFilePailInputFormat to use the CombineFileInputFormat. This should reduce the number of input splits for Pail sources. In my tests, several thousand splits were reduced to one. 

There is an issue with this change. It will not work with the hadoop 2.0.5-alpha, which is the version of hadoop that I have deployed. The reason is that the implementation of CombineFileInputFormat in that version does not call listStatus(JobConf conf) from the mapred package to get the list of files. Instead it calls ListStatus(JobContext conf) from the mapreduce package. 

Two possible fixes. 
- upgrade the hadoop version in dfs-datastores
- copy the definition of CombineFileInputFormat into dfs-datastore so the def is the same regardless of the hadoop version you use.