For a long time since we had to support older Solaris compress(1) was used
to compress the solaris bundles, since we are supporting Solaris 10 and
above, we must use bzip(1). bzip(1) is far more efficient and produces
smaller bundlers (I think it reduces by 20% more than compress(1).).

This will conserve storage/archival space and server bandwidth for
downloads.

The package names may need to be changed for solaris pkg archive, previously
we used compress for this and it was sufficient, now we can use something
like jdk-blah-de-blah-pkg.tar.bz, which will make it easier to identify the svr4
pkg bundle.