[Test] GoogleCloudStorageFixture command line is too long on Windows (#28991)
[Test] GoogleCloudStorageFixture command line is too long on Windows (#28991)

Windows has some strong limitations on command line arguments,
specially when it's too long. In the googlecloudstoragefixture anttask
the classpath argument is very long and the command fails. This commit
removes the classpath as an argument and uses the CLASSPATH
environment variable instead.
vroyer/elassandra,vroyer/elassandra,strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,strapdata/elassandra,strapdata/elassandra,strapdata/elassandra