Refactor lf-c-cpp-jobs for common anchor

Refactor templates in lf-c-cpp-jobs.yaml with common anchor/alias
lf_cmake_common to reduce redundant configuration.  This includes
gerrit-cmake-sonar, github-cmake-sonar, gerrit-cmake-sonarqube,
github-cmake-sonarqube, gerrit-cmake-stage, github-cmake-stage,
gerrit-cmake-verify and github-cmake-verify. No functional change.

Document maven settings parameters in g*t-cmake-stage templates.

Change-Id: I6477ad41da2b46adac2f76658dbf334db949b313
Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>