Added test setups for p4d versions going back to r14.1.
There is now a big single testng test suite that runs through most of these variations.
I've switched to using the p16.1 builds by default, which can easily be switched to the r16.1 builds.
Mainline p4d builds are still in use, since they are informative.
We may want to not use those on candidate line runs, however.