Add code to check the check sum by the DigestOutputStream.
Removed the duplicated code to check the checksum in the replicate method since the method D1Node.create, which is called by the replicate method, has the mechanism.
Add some debug information.
Change MetacatHandler.generateOutputName() to use the SystemMetadata.fileName value when it is available. Needs testing.
Add the code to filter out the pids with white spaces in the query.
Make sure it is same as branch 2.8 except the mdq stuff
Still use syncFailed.getPid to get identifier in the syncFailed method.
Fixed typos in the vairable name.
In the synchronizationFailed method, use syncExcpetion.getIdentifier method to try before the obsoleted method getPid.
Move a statement e.printStactTrace to the logMetacat.error method.
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