Patch new Cmake/Tox + SonarQube templates

Patch new Cmake/Tox + SonarQube templates

Revise templates gerrit-cmake-sonarqube and gerrit-tox-sonarqube
to move the triggering comment string into a parameter that can be
overridden in a job definition.  Github comment remains hardcoded.
This makes these new templates consistent with existing templates.
No functional change, the default is still "run-sonar".

Rename gerrit-cmake-sonarqube tempplate configuration parameter
from sonar-prescan-script to pre-build to be consistent with
existing CMake stage and verify templates. This is a breaking
change for any early adopters of this new template.

Correct release note file name prefix from cmake to tox

Change-Id: Ie98a58d2bf8cbffee110571df5d759c101cc3fc7
Issue-ID: RELENG-2760
Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>