Review xpassed tests

[viniarck]

Currently, on Nov 29, 2022, there are 7 xpassed tests that need review, if they're indeed supposed to be passing then we should remove xfail mark.

+ python3 -m pytest tests/ --reruns 2 -r fEr
============================= test session starts ==============================
platform linux -- Python 3.9.2, pytest-7.2.0, pluggy-1.0.0
rootdir: /builds/kytos/kytos-end-to-end-tester/kytos-end-to-end-tests
plugins: rerunfailures-10.2, timeout-2.1.0
collected 199 items
tests/test_e2e_01_kytos_startup.py ..                                    [  1%]
tests/test_e2e_05_topology.py ..................                         [ 10%]
tests/test_e2e_10_mef_eline.py .........Xss.....x....x.....              [ 24%]
tests/test_e2e_11_mef_eline.py .....                                     [ 26%]
tests/test_e2e_12_mef_eline.py .....xx.                                  [ 30%]
tests/test_e2e_13_mef_eline.py .....xxXx......xxXx.XXxX.xxxx..x......... [ 51%]
...                                                                      [ 52%]
tests/test_e2e_14_mef_eline.py x                                         [ 53%]
tests/test_e2e_15_maintenance.py ........................                [ 65%]
tests/test_e2e_15_mef_eline.py .                                         [ 65%]
tests/test_e2e_20_flow_manager.py ................                       [ 73%]
tests/test_e2e_21_flow_manager.py ..                                     [ 74%]
tests/test_e2e_22_flow_manager.py ...............                        [ 82%]
tests/test_e2e_23_flow_manager.py ..............                         [ 89%]
tests/test_e2e_30_of_lldp.py ....                                        [ 91%]
tests/test_e2e_31_of_lldp.py ...                                         [ 92%]
tests/test_e2e_32_of_lldp.py ...                                         [ 94%]
tests/test_e2e_40_sdntrace.py X.x                                        [ 95%]
tests/test_e2e_41_kytos_auth.py ........                                 [100%]
=============================== warnings summary ===============================
= 172 passed, 2 skipped, 18 xfailed, 7 xpassed, 793 warnings in 10315.14s (2:51:55) =

[viniarck]

Some of them are also related to the scope of #174 cc'ing @gretelliz for her information.