Tempest network agent test fails when there are no agents configured

[Hemachandra Reddy]

All the tests in tempest/api/network/admin/test_agent_management.py fail with ""IndexError: 'list index out of range'" when there are no agents available. In an environment where a SDN software like Tungsten Fabric (OpenContrail) is used, which does not have any agents, the below tests fail.

tempest.api.network.admin.test_agent_management.AgentManagementTestJSON.test_list_agent
tempest.api.network.admin.test_agent_management.AgentManagementTestJSON.test_list_agents_non_admin
tempest.api.network.admin.test_agent_management.AgentManagementTestJSON.test_show_agent
tempest.api.network.admin.test_agent_management.AgentManagementTestJSON.test_update_agent_description
tempest.api.network.admin.test_agent_management.AgentManagementTestJSON.test_update_agent_status

Modify skip_checks() or resource_setup() to see if there are any agents available. resource_setup() function assumes there is at least an agent available all the time.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/580762

[OpenStack Infra (hudson-openstack)]

Change abandoned by Hemachandra Reddy (<email address hidden>) on branch: master
Review: https://review.openstack.org/580762
Reason: Abandoning the change. Juniper fixed the issue: https://bugs.launchpad.net/juniperopenstack/+bug/1783581.

[Hemachandra Reddy (hr858f)]

Juniper fixed the issue: https://bugs.launchpad.net/juniperopenstack/+bug/1783581. We do not need this change.