IEC deploy jobs do not require cloning git submodules, which got
pretty heavy (more than 1GB), so at least for these jobs, disable
git submodules via JJB scm configuration.
Since `lf-infra-gerrit-scm` macro from lf-macros does not allow
configuration of submodule.disable, stop using said wrapper macro.
Change-Id: If6b41bf213a3cea095fabc03f8efbd3bda7d1723
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>