[dvs] Refactor ACL tests to use polling interface to access redis

[daall]

• Introduce new DVSDatabase abstraction and SONiC redis fixtures
• Refactor ACL tests to use redis fixtures

Signed-off-by: Danny Allen [email protected]

Why I did it

• To help make the vs tests more reliable by not relying on arbitrary wait times
• To make the vs tests faster by reducing the wait time (acl tests run in ~50% of the time now)

How I verified it

daall@rainier:~/dev/sonic-swss/tests$ sudo pytest -s -v --dvsname=vs test_acl.py
=========================================================================================== test session starts ============================================================================================
platform linux2 -- Python 2.7.17, pytest-4.6.9, py-1.8.1, pluggy-0.13.1 -- /usr/bin/python
cachedir: .pytest_cache
rootdir: /home/daall/dev/sonic-swss/tests
plugins: flaky-3.6.1
collected 24 items                                                                                                                                                                                         

test_acl.py::TestAcl::test_AclTableCreation PASSED
test_acl.py::TestAcl::test_AclRuleL4SrcPort PASSED
test_acl.py::TestAcl::test_AclRuleInOutPorts PASSED
test_acl.py::TestAcl::test_AclRuleInPortsNonExistingInterface PASSED
test_acl.py::TestAcl::test_AclRuleOutPortsNonExistingInterface PASSED
test_acl.py::TestAcl::test_AclTableDeletion PASSED
test_acl.py::TestAcl::test_V6AclTableCreation PASSED
test_acl.py::TestAcl::test_V6AclRuleIPv6Any PASSED
test_acl.py::TestAcl::test_V6AclRuleIPv6AnyDrop PASSED
test_acl.py::TestAcl::test_V6AclRuleIpProtocol PASSED
test_acl.py::TestAcl::test_V6AclRuleSrcIPv6 PASSED
test_acl.py::TestAcl::test_V6AclRuleDstIPv6 PASSED
test_acl.py::TestAcl::test_V6AclRuleL4SrcPort PASSED
test_acl.py::TestAcl::test_V6AclRuleL4DstPort PASSED
test_acl.py::TestAcl::test_V6AclRuleTCPFlags PASSED
test_acl.py::TestAcl::test_V6AclRuleL4SrcPortRange PASSED
test_acl.py::TestAcl::test_V6AclRuleL4DstPortRange PASSED
test_acl.py::TestAcl::test_V6AclTableDeletion PASSED
test_acl.py::TestAcl::test_InsertAclRuleBetweenPriorities PASSED
test_acl.py::TestAcl::test_RulesWithDiffMaskLengths PASSED
test_acl.py::TestAcl::test_AclRuleIcmp PASSED
test_acl.py::TestAcl::test_AclRuleIcmpV6 PASSED
test_acl.py::TestAcl::test_AclRuleRedirectToNextHop PASSED
test_acl.py::TestAclRuleValidation::test_AclActionValidation PASSED

======================================================================================= 24 passed in 119.13 seconds ========================================================================================

[daall]

retest this please

[yxieca]

retest this please

[daall]

retest this please