[posttest]Update test_posttest to ignore sanity_check and LogAnalyzer

[bingwang-ms]

Sanity_check and LogAnalyzer are ignored for posttest

Description of PR

Summary:
Fixes # (issue)
This PR is to update test_posttest.py to ignore sanity_check and LogAnalyzer.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Approach

What is the motivation for this PR?

The purpose of posttest script is to collect logs and dumps from DUT. So, sanity_check and LogAnalyzer are not necessary for it. To ensure that this case always succeed, sanity_check and LogAnalyzer are diasbled.

How did you do it?

Add two marker at module level.

pytest.mark.sanity_check(skip_sanity=True),
pytest.mark.disable_loganalyzer

How did you verify/test it?

Verified on Arista-7260

py.test --inventory ../ansible/str,../ansible/veos --host-pattern str-7260cx3-acs-1 --module-path ../ansible/library/ --testbed vms7-t0-7260-1 --testbed_file ../ansible/testbed.csv --junit-xml=tr.xml --log-cli-level warn --collect_techsupport=False --topology=t0,any,util -m posttest test_posttest.py
========================================================================================= test session starts =========================================================================================
platform linux2 -- Python 2.7.12, pytest-4.6.5, py-1.8.1, pluggy-0.13.1 -- /usr/bin/python
cachedir: .pytest_cache
ansible: 2.8.7
rootdir: /data/Networking-acs-sonic-mgmt/tests, inifile: pytest.ini
plugins: forked-1.1.3, xdist-1.28.0, ansible-2.2.2, repeat-0.8.0
collected 1 item                                                                                                                                                                                      

test_posttest.py::test_collect_techsupport PASSED                                                                                                                                               [100%]

------------------------------------------------------------------ generated xml file: /data/Networking-acs-sonic-mgmt/tests/tr.xml -------------------------------------------------------------------
====================================================================================== 1 passed in 80.55 seconds ======================================================================================

Any platform specific information?

No.

Supported testbed topology if it's a new test case?

N/A

Documentation

No