Separate install packaging from product packaging

Changes to staging scripts and jenkins jobs that use them.
Once the new job is instantiated in jenkins, an additional change will
be needed to add the installer-pub job into zuul daily build.

Change Zuul Pre-release & Release tags to have "_v<number>" component.
Installer versions will be either a date tag for daily builds or the
tag that indicates both trafodion version it supports and installer version.

Rebase includes changes from a13984c752 to stage-traf.sh which also need
to be in stage-install.sh, so that we don't post daily builds with no code
changes.

Change-Id: I64b77d3d052a4badac033cec4f7c0605ed42f930