Change debug mode for commands that generate too much output in sec_scan

Change debug mode for commands that generate too much output in sec_scan

The security scan test case generates sometimes too much output
messages and makes Jenkins unreadable.
For example:
https://build.opnfv.org/ci/job/functest-apex-apex-daily-colorado-daily-colorado/65/console

80% of the output belongs to this test case.
This patch will reduce it since debug information is not
showed in Jenkins but it is pushed as part of
functest.log to artifacts.

Change-Id: I56b3adf87d302d118ee5c15eb86bc10237a7cc4e
Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>