New functional test suite of otn-swith 2.2.1

New functional test suite of otn-swith 2.2.1

Create a new functional test suite testing the end-to-end 100GE service
management over two (or more) otn-switch. Two uses cases are verified:
- when two otn-switch are used as "AZ" node, at the termination of the
service
- when a thrid otn-switch is used as "intermediate" node, serving as an
otn-regenerator. In such a case, the 100GE/ODU4 service is supported by
two OTU4 server links.

Also update simulator configuration files to perform such a network
configuration with 3 ROADMs and 3 otn-switches. Adapt some functional
tests consequently.
Finally, rename tapi functional test to keep sequence logical.

JIRA: TRNSPRTPCE-530
Signed-off-by: Gilles Thouenon <gilles.thouenon@orange.com>
Change-Id: I117a1426d6ecabeeb2a170779846f08201f32d02