Added EEH test cases for PCI PT NIC devices

[TasmiyaNalatwad]

Added 2 test cases

1. Inject EEH from host console for pci pt device
2. Inject EEH from guest console for pci pt device

[misanjumn]

@TasmiyaNalatwad
Hi Tasmiya, can you run pylint on your py scripts. I see errors in the script.

# pylint libvirt_pci_passthrough_eeh.py
************* Module libvirt_pci_passthrough_eeh
libvirt_pci_passthrough_eeh.py:287:0: C0301: Line too long (133/100) (line-too-long)
libvirt_pci_passthrough_eeh.py:1:0: C0114: Missing module docstring (missing-module-docstring)
libvirt_pci_passthrough_eeh.py:36:0: R0914: Too many local variables (56/15) (too-many-locals)
libvirt_pci_passthrough_eeh.py:112:41: E0606: Possibly using variable 'session' before assignment (possibly-used-before-assignment)
libvirt_pci_passthrough_eeh.py:121:10: C0209: Formatting a regular string which could be an f-string (consider-using-f-string)
libvirt_pci_passthrough_eeh.py:148:40: C0209: Formatting a regular string which could be an f-string (consider-using-f-string)
libvirt_pci_passthrough_eeh.py:152:24: C0209: Formatting a regular string which could be an f-string (consider-using-f-string)
libvirt_pci_passthrough_eeh.py:153:24: C0209: Formatting a regular string which could be an f-string (consider-using-f-string)
libvirt_pci_passthrough_eeh.py:155:24: C0209: Formatting a regular string which could be an f-string (consider-using-f-string)
libvirt_pci_passthrough_eeh.py:164:23: C0209: Formatting a regular string which could be an f-string (consider-using-f-string)
libvirt_pci_passthrough_eeh.py:245:31: E0602: Undefined variable 'fdisk_list_before' (undefined-variable)
libvirt_pci_passthrough_eeh.py:271:23: E1101: Module 'virttest.utils_misc' has no 'get_location_code' member (no-member)
libvirt_pci_passthrough_eeh.py:288:20: W1203: Use lazy % formatting in logging functions (logging-fstring-interpolation)
libvirt_pci_passthrough_eeh.py:298:12: W1203: Use lazy % formatting in logging functions (logging-fstring-interpolation)
libvirt_pci_passthrough_eeh.py:316:12: W1201: Use lazy % formatting in logging functions (logging-not-lazy)
libvirt_pci_passthrough_eeh.py:316:26: C0209: Formatting a regular string which could be an f-string (consider-using-f-string)
libvirt_pci_passthrough_eeh.py:358:12: E0602: Undefined variable 'test_eeh_storage' (undefined-variable)
libvirt_pci_passthrough_eeh.py:36:0: R0912: Too many branches (16/12) (too-many-branches)
libvirt_pci_passthrough_eeh.py:36:0: R0915: Too many statements (220/50) (too-many-statements)
libvirt_pci_passthrough_eeh.py:77:4: W0612: Unused variable 'dargs' (unused-variable)
libvirt_pci_passthrough_eeh.py:17:0: C0411: standard import "platform" should be placed before third party import "aexpect" (wrong-import-order)
libvirt_pci_passthrough_eeh.py:18:0: C0411: standard import "time" should be placed before third party import "aexpect" (wrong-import-order)

------------------------------------------------------------------
Your code has been rated at 8.51/10 (previous run: 8.51/10, +0.00)

The pylint which throws E code are logical/syntactical errors.

[misanjumn]

Similarly, there are other errors which are to be tackled.
Kindly look into it,
Thank you.

[TasmiyaNalatwad]

@misanjumn I had executed pycodestyling to check the syntax and indentation errors already on this PR
What pylint is listing is not systax errors.

Still i have fixed some of them like removed f"strings, and shortened the lines.
The variable that is unused is written to add EEH for storage device, which Anushree will use that and add the code in her PR. The reason for keeping the variable is to maintain the code flow and keep adding new devices like storage and sriov in future, Anushree will use that and add the code further for storage.

Rest are like seen for all the .py files on tp_libvirt if you run the pylint on them.

Let me know any changes required

Thank You