fix the incorrect import with prefix src

[oneoneonepig]

Fixes: #976

An import entry in services/cims/src/oci_cli_incident/cims_cli_extended.py was referring to the src/ directory, which will end up in import error, making oci support subcommands to fail.

from oci_cli import custom_types
from oci_cli import json_skeleton_utils

from src.oci_cli import cli_exceptions

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[oneoneonepig]

OCA just signed, status under review.

[oneoneonepig]

The OCA application is pending for approval for 2 days. Can someone take a look along with this PR? @NiviPari @KalpanaRamasamy90