Add back [Template] override

Add back [Template] override

it seems our robot code cleanup using the tidy tool
for v3.2a1 actually removed empty [Template] lines
thinking they are a mistake? But, in those cases we
really wanted those test cases to skip the default
test template.

this was introduced with:
  https://git.opendaylight.org/gerrit/c/integration/test/+/86550/2/csit/suites/controller/dom_data_broker/clean_leader_shutdown.robot

potentially other test cases were affected, but this
should address some new failures we are debugging
for the sodium SR2 release.

Change-Id: Ib1b4f3126e82e703048dd6ef3f0fdf50336fc4be
Signed-off-by: Jamo Luhrsen <jluhrsen@gmail.com>