test: sctp firewalling

[jerome-jutteau]

We would like to check if exotic protocol filtering like sctp are managed by Butterfly.
Butterfly will also be able to manage SCTP port ranges.

Note: this issue has already been 95% done with tests/scenario_34/ except that setup/test is not done

Initial setup:

• VM1 configured on vni 42 with security group sg-1
• VM2 configured on vni 42 with security group sg-1
• sg-1 has no rules

Test that:

• Test SCTP connection VM1 -> VM2: KO
• Test SCTP connection VM2 -> VM1: KO

Change setup:

• Add rule to sg-1 allowing all protocols (-1) from all hosts

Test that:

• Test SCTP connection VM1 -> VM2: OK
• Test SCTP connection VM2 -> VM1: OK

Change setup:

• Remove rule to sg-1 allowing all protocols (-1) from all hosts

Test that:

• Test SCTP connection VM1 -> VM2: KO
• Test SCTP connection VM2 -> VM1: KO

Change setup:

• Add rule to sg-1 allowing only IP protocol 132 (sctp)

Test that:

• Test SCTP connection VM1 -> VM2: OK
• Test SCTP connection VM2 -> VM1: OK

[jerome-jutteau]

provided commit does not test this.