Consistently use BZip2 in CMake code instead of BZIP2
Created by: KyleFromKitware
Other parts of the code use ADIOS_HAVE_BZip2, and this inconsistency was causing installation failures. Fix the usage to make it consistent.
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Created by: KyleFromKitware
Other parts of the code use ADIOS_HAVE_BZip2, and this inconsistency was causing installation failures. Fix the usage to make it consistent.