tests: Improve ginkgo usage.
tests: Improve ginkgo usage.

This uses two ginkgo options.

verbose:

Add `-v` option to ginkgo in order to know what commands
are being running on each tests and not only the lines of
ginkgo.

focus:

Added -fucus option allow to only run some tests.

Example:

make integration FOCUS="docker kill"

will run only docker kill tests

Signed-off-by: Jose Carlos Venegas Munoz <821ab150128e889cb3ad9aab6e72689fd9ad26f2@intel.com>

chavafg/tests,chavafg/tests,MarioCarrilloA/tests,clearcontainers/tests,devimc/tests,clearcontainers/tests,devimc/tests,MarioCarrilloA/tests