Added pre-upgrade check for defect CSCwt69100

[Priyanka-Patil14]

Summary:
-This PR adds a new validation check: Stale dbgacEpgSummaryTask Objects.

-The check detects stale dbgacEpgSummaryTask objects stuck in processing state that can cause policymgr to crash on all APICs during upgrade (CSCwt69100).

What Changed:

• Added stale_epg_summary_task_check in aci-preupgrade-validation-script.py
• Added validation documentation in docs/docs/validations.md
• Added dedicated unit tests and test data under:
  tests/checks/stale_epg_summary_task_check/

Check Behavior:

• Returns `MANUAL' if target version is missing
• Returns N/A if target version is not in affected range (<= 6.1(5e) or <= 6.2(1g))
• Returns PASS if no dbgacEpgSummaryTask objects found in processing state
• Returns PASS if objects found but startTs is within 24 hours
• Returns FAIL_O if any dbgacEpgSummaryTask object has startTs older than 24 hours

Test Results:

• Pytest Logs: Full Run:
  CSCwt69100_Pytest_FullRun_Logs.txt

• Pytest Logs: stale_epg_summary_task_check (8 test cases)
  CSCwt69100_pytest.txt

• Full run (tversion 6.1(5e) and 6.2(2a)):
  CSCwt69100_FullRun_logs.txt

• Script Run Logs (PASS / NA / FAIL):
  CSCwt69100_PASS:FAIL:NA_logs.txt

Note: Added FAIL log from CU as lab repro is not feasible.

[Harinadh-Saladi]

I could see you have added only full script run logs. Can you attach your function alone logs. Please add the logs for PASS,FAIL and NA scenarios.

As Lovkesh has confirmed that attaching FAIL logs is not required (Issue is not recreatable, since repro factor is very less), pls attach cu log as a fail evidence.

[Harinadh-Saladi]

Address the comments

[Harinadh-Saladi]

Pls add pytest logs for your check as you added additional test cases.

[Priyanka-Patil14]

Pls add pytest logs for your check as you added additional test cases.

Attached the pytest logs for the check.
CSCwt69100_pytest.txt

[lovkeshsharma702]

Requirement already satisfied: MarkupSafe>=0.23 in ./venv27/lib/python2.7/site-packages (from jinja2==2.11.3->-r tests/requirements-py27.txt (line 7)) (1.1.1)
$ pytest --junitxml=report.xml
============================= test session starts ==============================
platform linux2 -- Python 2.7.11, pytest-4.6.11, py-1.11.0, pluggy-0.13.1
rootdir: /builds/aci-pre-upgrade-validation/aci-pre-upgrade-validation-script, inifile: pytest.ini
collected 875 items / 1 errors / 874 selected
==================================== ERRORS ====================================
_ ERROR collecting tests/checks/stale_epg_summary_task_check/test_stale_epg_summary_task_check.py _
venv27/lib/python2.7/site-packages/_pytest/python.py:507: in _importtestmodule
mod = self.fspath.pyimport(ensuresyspath=importmode)
venv27/lib/python2.7/site-packages/py/_path/local.py:704: in pyimport
import(modname)
E File "/builds/aci-pre-upgrade-validation/aci-pre-upgrade-validation-script/tests/checks/stale_epg_summary_task_check/test_stale_epg_summary_task_check.py", line 62
E SyntaxError: Non-ASCII character '\xe2' in file /builds/aci-pre-upgrade-validation/aci-pre-upgrade-validation-script/tests/checks/stale_epg_summary_task_check/test_stale_epg_summary_task_check.py on line 62, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details

• generated xml file: /builds/aci-pre-upgrade-validation/aci-pre-upgrade-validation-script/report.xml -
  !!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!
  =========================== 1 error in 10.94 seconds ===========================
  Uploading artifacts for failed job
  00:03
  Uploading artifacts...
  report.xml: found 1 matching artifact files and directories
  Uploading artifacts as "junit" to coordinator... 201 Created id=440 responseStatus=201 Created token=glcbt-64
  ERROR: Job failed: exit code 1