Jenkins Building Content at least 3 times

[Gabe Alford]

Hello,

Using the Jenkins build target, I noticed that the build process
goes through building the SCAP content at least 3 times. It builds it once
for `all`, once for 'dist`, and finally once for `validate`.

I wonder if this is by design? It would be nice to consolidate it down to
building it once for a faster Jenkins run. Maybe the Jenkins target could
be the following:

jenkins: clean all

instead of:

jenkins: clean all dist validate

This would greatly reduce Jenkins tests and the amount of time those tests
are run.

Gabe