Adjust version update suffix in java-sdk to avoid brew revision suffix match.

With pure numeric suffix (e.g., 1.7.0_67), PkgVersion incorrectly matches
version as '1.7.0' and revision as 67. This result in incorrect version
comparision in method '<=>' and the package is always marked 'outdated'.

We should not be using 'revision' label either because it is meant to
mark newer revision of the brew formula and not the version of the
actual package.