Product build should be able to source from upstream Updatesite build when set to RELEASE=Yes

When RELEASE=Yes, zips are generated w/ a suffix such as http://www.qa.jboss.com/binaries/RHDS/builds/staging/devstudio-5.0_stable_branch.updatesite/extras-Update-2011-06-24_08-09-09-H8.zip

When RELEASE=No, zips are generated w/ a static suffix: http://www.qa.jboss.com/binaries/RHDS/builds/staging/devstudio-5.0_stable_branch.updatesite/extras-Update-SNAPSHOT.zip

Currently, a number of files in JBDS product builder assume the filename for this file is static.

For example, releng/org.jboss.ide.eclipse.releng/builders/jbds-all-package/build.properties, line 38, points at jar:file:${repoBaseLocation}/extras-Update-SNAPSHOT.zip!/ and cannot resolve variables like ${ZIPSUFFIX} or ${jbds.extra.build.archive} as defined in releng/org.jboss.ide.eclipse.releng/requirements/jbds-extra-update/build.properties. As such, this filename must currently be hard-coded and the upstream updatesite job must be set to RELEASE=No.

Instead, any suffix should be supported via fetching the file's name from here:

http://www.qa.jboss.com/binaries/RHDS/builds/staging/devstudio-5.0_stable_branch.updatesite/logs/build.properties