Add Unit Tests for Vault Commands

[mkah91]

No description provided.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
__init__.py	0	0	100%
azkv.py	10	10	0%	1, 3, 6–11, 14–15
decorators.py	17	17	0%	1–2, 4, 7–10, 12, 15–22, 24
main.py	62	62	0%	1–2, 4–5, 7–15, 17–18, 21–25, 27–35, 38–39, 43–46, 49–53, 55, 58–62, 64, 67–70, 72, 75–84
client
__init__.py	0	0	100%
keyvault_client.py	81	51	37%	38–39, 42–44, 48, 51–53, 56–57, 60, 63–67, 70–73, 76–77, 79–80, 83–91, 94–99, 101, 104–113
keyvault_clients.py	75	53	29%	12–16, 21–25, 29, 32–35, 38–42, 45–47, 49–50, 53–54, 57–68, 71–72, 75, 80, 83, 86–94
keyvault_secret.py	17	6	64%	14–16, 19–21
commands
__init__.py	0	0	100%
check.py	25	0	100%
common.py	42	1	97%	89
edit.py	37	7	81%	20–26
show.py	45	7	84%	20–26
commands/vaults
__init__.py	0	0	100%
add.py	18	0	100%
login.py	13	0	100%
main.py	50	50	0%	1, 3–7, 10–13, 15–20, 23–26, 28–37, 40–43, 45–50, 53–56, 58–63
remove.py	13	0	100%
select.py	11	3	72%	10–12
TOTAL	516	267	48%

[fbufler]

Just some minor improvement, else LGTM