Routing rule scenario tests

[xieus]

• Network-level routing table update
• Subnet-level routing table update
• Scenario 1: Step 1 Create subnet/port/router, Step 2 attach Subnet to router, Step 3 Add routing rule
• Scenario 2: Step 1 Create subnet/router and attach subnet with router, Step 2 create port, Step 3 add routing rule
• Scenario 3:Step 1 Create subnet/router and attach subnet with router, Step 2 add routing rule, Step 3 create port

[yanmo96]

For Scenario 3:Step 1 Create subnet/router and attach subnet with router, Step 2 add routing rule, Step 3 create port

• For Step 3, need to start gateway port first