Amend: Added WMO header finder since the header property will have additional information in it when file comes from LDM. Also changed MessageGenerator to use new class for finding the wmo header
Amend: Added try-finally for input stream in DataUnzipper
Change-Id: I4ece2f5f24a429aa41969f51040a58e67e79e1c1
Former-commit-id: 7ace2035c5 [formerly 756988cb8b] [formerly b669f57ee4 [formerly 2f17b2f49f65da4b7b7fd531377873cb9eb941dd]]
Former-commit-id: b669f57ee4
Former-commit-id: 51f9666fcb