Extend e2e tests

[LionelJouin]

Is your feature request related to a problem? Please describe.
Here is the list of current e2e test cases we have in Meridio:
https://github.com/Nordix/Meridio/blob/master/docs/test.md#list-of-tests
The list should be extended.

Describe the solution you'd like

Name	Type	Description
SCTP-IPv4	IngressTraffic
SCTP-IPv6	IngressTraffic
open-stream-2	TAPA	Open stream-a-II in one of the target from target-a-deployment-name and close it
new-flow	Configuration	Create/Delete a flow
new-stream	Configuration	Create/Delete a stream
new-conduit-attractor-gateway	Configuration	Create/Delete a conduit/attractor/gateway
update-flow	Configuration	TDB: flow, vips, source-subnets, source-ports, destination-ports, protocols, priority, byte-matches
update-stream	Configuration	TBD: conduit, max-targets
update-conduit	Configuration	TDB: destination-port-nats
update-attractor	Configuration	TDB: composites. gateways, vips
update-gateway	Configuration	TDB
gateway-bgp	Configuration
gateway-bgp-authentication	Configuration
gateway-static-bfd	Configuration
attractor-nsm-vlan	Configuration
attractor-nsm-vlan-0	Configuration
attractor-multus	Configuration
stream-max-targets	Configuration
conduit-destination-port-nats	Configuration
flow-byte-matches	Configuration
attractor-scaling	LifeCycle	(2*)
Upgrade-Rollback	LifeCycle
Resiliency	LifeCycle	Chaos Monkey? (1*)
Uninstall-Install	LifeCycle
Multi-Operator	MultiTenancy
Full-Test-Scope	LongRun	Run a Kubernetes cluster during a week (configurable) and run the full test scope once every hour (configurable)
Benchmark	Performance

1. How to handle resiliency? Should we use a chaos monkey?
2. Add extra check in the LB to see if traffic is going through all.

Describe alternatives you've considered
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Additional context
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