Multi-context - add/update/delete - l2bd instances test case - add 10, del 5, add new 10, del 15.

L2BD Multi-instance Test Case HLD:

*NOTES:*

• higher number of pg-l2 interfaces causes problems => only 15 pg-l2 \
  interfaces in 5 bridge domains are tested
• more then 1 host per pg-l2 interface in configuration with 15 l2-pg \
  interfaces leads to problems too

*config 1*

• add 15 pg-l2 interfaces
• configure one host per pg-l2 interface
• configure 5 bridge domains (BD)
• add 3 pg-l2 interfaces per BD

*test 1*

• send L2 MAC frames between all pg-l2 interfaces of all BDs

*verify 1*

• check BD data by parsing output of bridge_domain_dump API command
• all packets received correctly

*config 2*

• update data of 5 BD
• disable learning, forwarding, flooding and uu_flooding for BD1
• disable forwarding for BD2
• disable flooding for BD3
• disable uu_flooding for BD4
• disable learning for BD5

*verify 2*

• check BD data by parsing output of bridge_domain_dump API command

*config 3*

• delete 2 BDs

*test 3*

• send L2 MAC frames between all pg-l2 interfaces of all BDs
• send L2 MAC frames between all pg-l2 interfaces formerly assigned to \
  deleted BDs

*verify 3*

• check BD data by parsing output of bridge_domain_dump API command
• all packets received correctly on all 3 pg-l2 interfaces assigned to BDs
• no packet received on all 3 pg-l2 interfaces of all deleted BDs

*config 4*

• add 2 BDs
• add 3 pg-l2 interfaces per BD

*test 4*

• send L2 MAC frames between all pg-l2 interfaces of all BDs

*verify 4*

• check BD data by parsing output of bridge_domain_dump API command
• all packets received correctly

*config 5*

• delete 5 BDs

*verify 5*

• check BD data by parsing output of bridge_domain_dump API command