Add a check to return the oam_floating_ip if the
oam_ip is unavailable.
This ensures correct retrieval of the subcloud_ip
when the oam_ip missing.
Test Plan:
PASS: Run python scripts/lab_capability_scanner.py
--lab_config_file=config/lab/files/<lab_config_file.json5>
and verify subcloud section added in lab_config_file.json5.
PASS: Verify subcloud_ip was returning oam_flating_ip when
oam_ip was not present.
Change-Id: Id3a5eaae811a5bcccb737059fe01e796d07dc15c
Signed-off-by: Swapna Gorre <swapna.gorre@windriver.com>