tests: Add initial sanity checks to the GlusterFS Test Framework

BUG: 1073168
Change-Id: I0b995d94fe83053d3294df1b5fad2eef3b4355d3
Signed-off-by: Justin Clift <justin@gluster.org>
Reviewed-on: http://review.gluster.org/7193
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>