Run tests against all plugins

This "Script" is written in C++ and is cross platform (i.e. works on
both Linux and Windows). It provides options for running the test suite
against different plugins as well as other options such as running them
under a debugger.

Change-Id: I1f9710dec850f252024ee037b962d526b7326a2d
Reviewed-on: http://review.couchbase.org/28008
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>